我帮你编写了一部分，实现了“输入十个同学的相关信息，并在文本框中显示”（图形界面实现）。
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要实现接下去的功能其实也真的不难的，但是真的很麻烦、很浪费时间……我就帮你做到这里了，你自己添加一下代码就可以（或者提高悬赏的话可以考虑考虑啊！哈哈……）代码如下：
import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JFrame;
import java.awt.Dimension;
import javax.swing.JButton;
import java.awt.Rectangle;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JOptionPane;
public class TongJi extends JFrame {
private static final long serialVersionUID = 1L;
private JPanel jContentPane = null;
private JButton jButton = null;
private JLabel jLabel = null;
private JScrollPane jScrollPane = null;
private JTextArea jTextArea = null;
/**
* This is the default constructor
*/
public TongJi() {
super();
initialize();
}
/**
* This method initializes this
*
* @return void
*/
private void initialize() {
this.setSize(412, 372);
this.setContentPane(getJContentPane());
this.setTitle("成绩统计");
this.addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent e) {
System.exit(0);
}
});
this.setVisible(true);
}
/**
* This method initializes jContentPane
*
* @return javax.swing.JPanel
*/
private JPanel getJContentPane() {
if (jContentPane == null) {
jLabel = new JLabel();
jLabel.setBounds(new Rectangle(18, 66, 65, 18));
jLabel.setHorizontalAlignment(SwingConstants.CENTER);
jLabel.setText("统计结果：");
jContentPane = new JPanel();
jContentPane.setLayout(null);
jContentPane.add(getJButton(), null);
jContentPane.add(jLabel, null);
jContentPane.add(getJScrollPane(), null);
}
return jContentPane;
}
/**
* This method initializes jButton
*
* @return javax.swing.JButton
*/
private JButton getJButton() {
if (jButton == null) {
jButton = new JButton();
jButton.setBounds(new Rectangle(18, 16, 86, 28));
jButton.setText("开始统计");
jButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
/////录入成绩信息
String[][] mymsg=new String[10][6];
for(int i=0;i10;i++){
String strnum=JOptionPane.showInputDialog(null, "请输入第"+(i+1)+"个学生的学号", "信息录入", JOptionPane.WARNING_MESSAGE);
String strname=JOptionPane.showInputDialog(null, "请输入第"+(i+1)+"个学生的姓名", "信息录入", JOptionPane.WARNING_MESSAGE);
String doublemath=JOptionPane.showInputDialog(null, "请输入第"+(i+1)+"个学生的数学成绩", "信息录入", JOptionPane.WARNING_MESSAGE);
String doubleeng=JOptionPane.showInputDialog(null, "请输入第"+(i+1)+"个学生的英语成绩", "信息录入", JOptionPane.WARNING_MESSAGE);
String doublejava=JOptionPane.showInputDialog(null, "请输入第"+(i+1)+"个学生的JAVA成绩", "信息录入", JOptionPane.WARNING_MESSAGE);
String doublecomp=JOptionPane.showInputDialog(null, "请输入第"+(i+1)+"个学生的计算机成绩", "信息录入", JOptionPane.WARNING_MESSAGE);
mymsg[i][0]=strnum;
mymsg[i][1]=strname;
mymsg[i][2]=doublemath;
mymsg[i][3]=doubleeng;
mymsg[i][4]=doublejava;
mymsg[i][5]=doublecomp;
}
////显示成绩信息
jTextArea.setText("学号 姓名 数学 英语 JAVA 计算机");
for(int i=0;i10;i++){
jTextArea.setText(jTextArea.getText()+"\r\n");
for(int j=0;j6;j++){
jTextArea.setText(jTextArea.getText()+mymsg[i][j]+" ");
}
}
}
});
}
return jButton;
}
/**
* This method initializes jScrollPane
*
* @return javax.swing.JScrollPane
*/
private JScrollPane getJScrollPane() {
if (jScrollPane == null) {
jScrollPane = new JScrollPane();
jScrollPane.setBounds(new Rectangle(18, 86, 370, 230));
jScrollPane.setViewportView(getJTextArea());
}
return jScrollPane;
}
/**
* This method initializes jTextArea
*
* @return javax.swing.JTextArea
*/
private JTextArea getJTextArea() {
if (jTextArea == null) {
jTextArea = new JTextArea();
jTextArea.setEditable(false);
}
return jTextArea;
}
public static void main(String args[]){
new TongJi();
}
} // @jve:decl-index=0:visual-constraint="10,10"
效果如下图：
比较完整的Java计算器
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
public class calculator extends JFrame implements ActionListener
{//这里我把JFrame写成Frame，这个错误找了好久
JFrame frame;
private JButton jia=new JButton("+");
private JButton jian=new JButton("-");
private JButton cheng=new JButton("*");
private JButton chu=new JButton("/");
private JButton qiuyi=new JButton("%");
private JButton deng=new JButton("=");
private JButton fu=new JButton("+/-");
private JButton dian=new JButton(".");
private JButton kai=new JButton("sqrt");
private JButton diao=new JButton("1/x");
private JButton aa=new JButton("A");
private JButton bb=new JButton("B");
private JButton cc=new JButton("C");
private JButton dd=new JButton("D");
private JButton ee=new JButton("E");
private JButton ff=new JButton("F");
private TextField k1=new TextField();
private objConversion convert = new objConversion();
JMenuItem copy,paste,s,t,help,about,me;
JRadioButton sixteen,ten,eight,two;
JButton backspace,ce,c,num0,num1,num2,num3,num4,num5,num6,num7,num8,num9;
Container cp;
JTextField text;
String copycontent="";
boolean clickable=true,clear=true;
int all=0;
double qian;
String fuhao;
int jin=10,first=1;
public calculator()
{
setTitle("计算器－杨彩制作");
setSize(400,300);
setLocation(250,200);
text=new JTextField(25);
// text.setEnabled(false);
text.setText("0.");
text.setHorizontalAlignment(JTextField.RIGHT);//从右到左
JPanel cp1=new JPanel();
JPanel cp2=new JPanel();
JPanel cp3=new JPanel();
cp=getContentPane();
cp.add(cp1,"North");
cp.add(cp2,"Center");
cp.add(cp3,"South");
cp1.setLayout(new GridLayout(1,6));
cp2.setLayout(new GridLayout(2,4));
cp3.setLayout(new GridLayout(6,6));
sixteen=new JRadioButton("十六进制");
sixteen.setVisible(false);
ten=new JRadioButton("十进制",true);
ten.setVisible(false);
eight=new JRadioButton("八进制");
eight.setVisible(false);
two=new JRadioButton("二进制");
two.setVisible(false);
sixteen.addActionListener(this);
ten.addActionListener(this);
eight.addActionListener(this);
two.addActionListener(this);
ButtonGroup btg=new ButtonGroup();
btg.add(sixteen);
btg.add(ten);
btg.add(eight);
btg.add(two);
JTextField t3=new JTextField(25);
cp1.add(text);
// text.setEnabled(false);
text.setEditable(false);
text.setBackground(new Color(255, 255, 255));
cp2.add(sixteen);
cp2.add(ten);
cp2.add(eight);
cp2.add(two);
backspace=new JButton("Backspace");
backspace.setForeground(new Color(255,0,0));
backspace.addActionListener(this);
ce=new JButton("CE");
ce.setForeground(new Color(255,0,0));
ce.addActionListener(this);
c=new JButton("C");
c.setForeground(new Color(255,0,0));
c.addActionListener(this);
k1.setVisible(false);
cp2.add(k1);
cp2.add(backspace);
cp2.add(ce);
cp2.add(c);
num0=new JButton("0");
num1=new JButton("1");
num2=new JButton("2");
num3=new JButton("3");
num4=new JButton("4");
num5=new JButton("5");
num6=new JButton("6");
num7=new JButton("7");
num8=new JButton("8");
num9=new JButton("9");
cp3.add(num7);
num7.addActionListener(this);
cp3.add(num8);
num8.addActionListener(this);
cp3.add(num9);
num9.addActionListener(this);
cp3.add(chu);
chu.setForeground(new Color(255,0,0));
chu.addActionListener(this);
cp3.add(kai);
kai.addActionListener(this);
cp3.add(num4);
num4.addActionListener(this);
cp3.add(num5);
num5.addActionListener(this);
cp3.add(num6);
num6.addActionListener(this);
cp3.add(cheng);
cheng.setForeground(new Color(255,0,0));
cheng.addActionListener(this);
cp3.add(qiuyi);
qiuyi.addActionListener(this);
cp3.add(num1);
num1.addActionListener(this);
cp3.add(num2);
num2.addActionListener(this);
cp3.add(num3);
num3.addActionListener(this);
cp3.add(jian);
jian.setForeground(new Color(255,0,0));
jian.addActionListener(this);
cp3.add(diao);
diao.addActionListener(this);
cp3.add(num0);
num0.addActionListener(this);
cp3.add(fu);
fu.addActionListener(this);
cp3.add(dian);
dian.addActionListener(this);
cp3.add(jia);
jia.setForeground(new Color(255,0,0));
jia.addActionListener(this);
cp3.add(deng);
deng.setForeground(new Color(255,0,0));
deng.addActionListener(this);
cp3.add(aa);
aa.addActionListener(this);
cp3.add(bb);
bb.addActionListener(this);
cp3.add(cc);
cc.addActionListener(this);
cp3.add(dd);
dd.addActionListener(this);
cp3.add(ee);
ee.addActionListener(this);
cp3.add(ff);
ff.addActionListener(this);
aa.setVisible(false);
bb.setVisible(false);
cc.setVisible(false);
dd.setVisible(false);
ee.setVisible(false);
ff.setVisible(false);
JMenuBar mainMenu = new JMenuBar();
setJMenuBar(mainMenu);
JMenu editMenu = new JMenu("编辑");
JMenu viewMenu = new JMenu("查看");
JMenu helpMenu = new JMenu("帮助");
mainMenu.add(editMenu);
mainMenu.add(viewMenu);
mainMenu.add(helpMenu);
copy = new JMenuItem(" 复制");
paste = new JMenuItem(" 粘贴");
KeyStroke copyks=KeyStroke.getKeyStroke(KeyEvent.VK_C,Event.CTRL_MASK);
copy.setAccelerator(copyks);//设置退出菜单选项加上快捷键
KeyStroke pasteks=KeyStroke.getKeyStroke(KeyEvent.VK_V,Event.CTRL_MASK);
paste.setAccelerator(pasteks);//设置退出菜单选项加上快捷键
editMenu.add(copy);
editMenu.add(paste);
copy.addActionListener(this);
paste.addActionListener(this);
t = new JMenuItem("●标准型");
s = new JMenuItem(" 科学型");
viewMenu.add(t);
viewMenu.add(s);
t.addActionListener(this);
s.addActionListener(this);
help = new JMenuItem(" 帮助主题");
about = new JMenuItem(" 关于计算器");
me = new JMenuItem(" 作者主页");
helpMenu.add(help);
helpMenu.add(about);
helpMenu.add(me);
help.addActionListener(this);
about.addActionListener(this);
me.addActionListener(this);
addWindowListener(new WindowDestroyer());//结束窗口
}
public void actionPerformed(ActionEvent e)
{//响应动作代码
if(first==1)
text.setText("");
first=0;//第一次把文本框0.清空
Object temp = e.getSource();
if(temp==copy)
{
copycontent = text.getText();
}
if(temp==paste)
{
text.setText(text.getText()+copycontent);
}
if(temp==t)
{//标准
sixteen.setVisible(false);
ten.setVisible(false);
eight.setVisible(false);
two.setVisible(false);
t.setText("●标准型");
s.setText(" 科学型");
aa.setVisible(false);
bb.setVisible(false);
cc.setVisible(false);
dd.setVisible(false);
ee.setVisible(false);
ff.setVisible(false);
}
if(temp==s)
{//科学
sixteen.setVisible(true);
ten.setVisible(true);
eight.setVisible(true);
two.setVisible(true);
t.setText(" 标准型");
s.setText("●科学型");
aa.setVisible(true);
bb.setVisible(true);
cc.setVisible(true);
dd.setVisible(true);
ee.setVisible(true);
ff.setVisible(true);
aa.setEnabled(false);
bb.setEnabled(false);
cc.setEnabled(false);
dd.setEnabled(false);
ee.setEnabled(false);
ff.setEnabled(false);
}
if(temp==help)
{ //打开系统帮助文件 要查资料
try
{
String filePath = "C:/WINDOWS/Help/calc.chm";
Runtime.getRuntime().exec("cmd.exe /c "+filePath);
}
catch(Exception eeee)
{
System.out.println("打开系统的计算器出错");
}
}
if(temp==about)
{
JOptionPane.showMessageDialog(frame," Java计算器\n 杨彩 制作\n\n ","关于计算器",JOptionPane.INFORMATION_MESSAGE); ;
}
if(temp==me)
{
try
{
Process p = Runtime.getRuntime().exec("explorer ");
}
catch(Exception eeee)
{
System.out.println("打开指定网页出错");
}
}
try
{
if(temp==sixteen)
{
String hex=text.getText();
int inthex=Integer.parseInt(hex,jin);//先把数变为10进制
text.setText(convert.decHex(inthex)) ;
jin=16;
aa.setEnabled(true);
bb.setEnabled(true);
cc.setEnabled(true);
dd.setEnabled(true);
ee.setEnabled(true);
ff.setEnabled(true);
num2.setEnabled(true);
num3.setEnabled(true);
num4.setEnabled(true);
num5.setEnabled(true);
num6.setEnabled(true);
num7.setEnabled(true);
num8.setEnabled(true);
num9.setEnabled(true);
}
if(temp==eight)
{
String oct =text.getText();
int intoct=Integer.parseInt(oct,jin);
text.setText(convert.decOct(intoct)) ;
jin=8;
aa.setEnabled(false);
bb.setEnabled(false);
cc.setEnabled(false);
dd.setEnabled(false);
ee.setEnabled(false);
ff.setEnabled(false);
num2.setEnabled(true);
num3.setEnabled(true);
num4.setEnabled(true);
num5.setEnabled(true);
num6.setEnabled(true);
num7.setEnabled(true);
num8.setEnabled(false);
num9.setEnabled(false);
}
if(temp==two)
{
String bin=text.getText();
int intbin=Integer.parseInt(bin,jin);
text.setText(convert.decBin(intbin));
jin=2;
aa.setEnabled(false);
bb.setEnabled(false);
cc.setEnabled(false);
dd.setEnabled(false);
ee.setEnabled(false);
ff.setEnabled(false);
num2.setEnabled(false);
num3.setEnabled(false);
num4.setEnabled(false);
num5.setEnabled(false);
num6.setEnabled(false);
num7.setEnabled(false);
num8.setEnabled(false);
num9.setEnabled(false);
}
if(temp==ten)
{
String dec=text.getText();
int intdec=Integer.parseInt(dec,jin);
// text.setText(convert.decDec(intdec)); //本句会把123变成321
text.setText(intdec+"");
jin=10;
aa.setEnabled(false);
bb.setEnabled(false);
cc.setEnabled(false);
dd.setEnabled(false);
ee.setEnabled(false);
ff.setEnabled(false);
num2.setEnabled(true);
num3.setEnabled(true);
num4.setEnabled(true);
num5.setEnabled(true);
num6.setEnabled(true);
num7.setEnabled(true);
num8.setEnabled(true);
num9.setEnabled(true);
}
}
catch(Exception ee)
{
System.out.println("转换出错,可能你没有输入任何字符");
text.setText("转换出错");
clear=false;
}
if(temp==backspace)
{//退格
String s = text.getText();
text.setText("");
for (int i = 0; i s.length() - 1; i++)
{
char a = s.charAt(i);
text.setText(text.getText() + a);
}
}
if (temp==ce)
{
text.setText("0.");
clear=true;
first=1;
}
if (temp==c)
{
text.setText("0."); ;
clear=true;
first=1;
}
if(temp==num0)
{
if(clear==false)//判断是否点击了符号位
text.setText("");
text.setText(text.getText()+"0");
}
if(temp==num1)
{
if(clear==false)
text.setText("");
text.setText(text.getText()+"1");
clear=true;//第二次不在清空（前二句）
}
if(temp==num2)
{
if(clear==false)
text.setText("");
text.setText(text.getText()+"2");
clear=true;
}
if(temp==num3)
{
if(clear==false)
text.setText("");
text.setText(text.getText()+"3");
clear=true;
}
if(temp==num4)
{
if(clear==false)
text.setText("");
text.setText(text.getText()+"4");
clear=true;
}
if(temp==num5)
{
if(clear==false)
text.setText("");
text.setText(text.getText()+"5");
clear=true;
}
if(temp==num6)
{
if(clear==false)
text.setText("");
text.setText(text.getText()+"6");
clear=true;
}
if(temp==num7)
{
if(clear==false)
text.setText("");
text.setText(text.getText()+"7");
clear=true;
}
if(temp==num8)
{
if(clear==false)
text.setText("");
text.setText(text.getText()+"8");
clear=true;
}
if(temp==num9)
{
if(clear==false)
text.setText("");
text.setText(text.getText()+"9");
clear=true;
}
if(temp==aa)
{
text.setText(text.getText()+"A");
}
if(temp==bb)
{
text.setText(text.getText()+"B");
}
if(temp==cc)
{
text.setText(text.getText()+"C");
}
if(temp==dd)
{
text.setText(text.getText()+"D");
}
if(temp==ee)
{
text.setText(text.getText()+"E");
}
if(temp==ff)
{
text.setText(text.getText()+"F");
}
if(temp==dian)
{
clickable=true;
for (int i = 0; i text.getText().length(); i++)
if ('.' == text.getText().charAt(i))
{
clickable=false;
break;
} //第一层判断是否里面含有小数点;
if(clickable==true)//第二坛判断
text.setText(text.getText()+".");
}
try
{
if(temp==jia)
{//加法
qian=Double.parseDouble(text.getText());
fuhao="+";
clear=false;
}
if(temp==jian)
{
qian=Double.parseDouble(text.getText());
fuhao="-";
clear=false;
;
}
if(temp==cheng)
{
qian=Double.parseDouble(text.getText());
fuhao="*";
clear=false;
}
if(temp==chu)
{
qian=Double.parseDouble(text.getText());
fuhao="/";
clear=false;
}
if(temp==deng)
{
double ss=Double.parseDouble(text.getText());
text.setText("");
if(fuhao=="+")
text.setText(qian+ss+"");
if(fuhao=="-")
text.setText(qian-ss+"");
if(fuhao=="*")
text.setText(qian*ss+"");
if(fuhao=="/")
text.setText(qian/ss+"");
clear=false;//要清空前一次的数据
;
}
if(temp==kai)
{
String s = text.getText();
if (s.charAt(0) == '-')
{
text.setText("负数不能开根号");
}
else
text.setText(Double.toString(java.lang.Math.sqrt(Double.parseDouble(text.getText()))));
clear=false;
}
if(temp==diao)
{
if (text.getText().charAt(0) == '0'text.getText().length() == 1)
{
text.setText("除数不能为零");
}
else
{
boolean isDec = true;
int i, j, k;
String s = Double.toString(1 / Double.parseDouble(text.getText()));
for (i = 0; i s.length(); i++)
if (s.charAt(i) == '.')
break;
for (j = i + 1; j s.length(); j++)
if (s.charAt(j) != '0')
{
isDec = false;
break;
}
if (isDec == true)
{
String stemp = "";
for (k = 0; k i; k++)
stemp += s.charAt(k);
text.setText(stemp);
}
else
text.setText(s);
}
clear=false;
}
if(temp==qiuyi)
{
text.setText("0");
clear=false;
}
if (temp == fu)
{ //导师，此方法参考书中例子
boolean isNumber = true;
String s = text.getText();
for (int i = 0; i s.length(); i++)
if (! (s.charAt(i) = '0' s.charAt(i) = '9' || s.charAt(i) == '.' ||
s.charAt(i) == '-'))
{
isNumber = false;
break;
}
if (isNumber == true)
{
//如果当前字符串首字母有'-'号,代表现在是个负数,再按下时,则将首符号去掉
if (s.charAt(0) == '-')
{
text.setText("");
for (int i = 1; i s.length(); i++)
{
char a = s.charAt(i);
text.setText(text.getText() + a);
}
}
//如果当前字符串第一个字符不是符号，则添加一个符号在首字母处
else
text.setText('-' + s);
}
}
}
catch(Exception eee)
{
System.out.println("运算时,首先输入数字或字符");
text.setText("运算出错");
clear=false;
}
}
class WindowDestroyer extends WindowAdapter
{//退出窗口动作
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
class objConversion
{//导师,本进制类参考了CSMD类转换例子
public void objConversion ()
{
}
public String decDec (int decNum)
{//10
String strDecNum = Integer.toString(decNum);
for (int i = strDecNum.length(); i 3; i++)
{
strDecNum = "0" + strDecNum;
}
// return strDecNum;
return invert (strDecNum, 5);
}
public String decHex (int decNum)
{//10 to 16
String strHexNum = "";
int currentNum = 0;
while (decNum != 0)
{
if (decNum 15)
{
currentNum = decNum % 16;
decNum /= 16;
}
else
{
currentNum = decNum;
decNum = 0;
}
switch (currentNum)
{
case 15: strHexNum += "F";
break;
case 14: strHexNum += "E";
break;
case 13: strHexNum += "D";
break;
case 12: strHexNum += "C";
break;
case 11: strHexNum += "B";
break;
case 10: strHexNum += "A";
break;
default: strHexNum += Integer.toString(currentNum);
break;
}
}
return invert (strHexNum, 2);
}
public String decOct (int decNum)
{//10 to 8
String strOctNum = "";
while (decNum != 0)
{
if (decNum 7)
{
strOctNum += Integer.toString(decNum % 8);
decNum /= 8;
}
else
{
strOctNum += Integer.toString(decNum);
decNum = 0;
}
}
return invert (strOctNum, 3);
}
public String decBin (int decNum)
{//10 to 2
String strBinNum = "";
while (decNum != 0)
{
if (decNum 1)
{
strBinNum += Integer.toString(decNum % 2);
decNum /= 2;
}
else
{
strBinNum += Integer.toString(decNum);
decNum = 0;
}
}
return invert (strBinNum, 8);
}
private String invert (String strNum, int minLength) //转换长度
{
String answer = "";
int length = strNum.length();
if (length minLength)
{
for (int padding = (minLength - length); padding 0; padding--)
{
answer += "0";
}
}
for (int i = length; i 0; i--)
{
answer += strNum.charAt (i - 1);
}
return answer;
}
}
public static void main(String arg[])//产生窗口
{
calculator win = new calculator();
win.setVisible(true);
}
}
public static void main(String[] args) {
/**
*
* （1）实现整型数组的创建要求由用户输入数组长度以及数组元素
*/
Scanner input = new Scanner(System.in);
System.out.print("请输入整型数组的长度：");
int lengthInt = input.nextInt();
int[] arrInt = new int[lengthInt];
for (int i = 0; i arrInt.length; i++) {
System.out.println("请输入第" + (i + 1) + "个元素");
arrInt[i] = input.nextInt();
}
System.out.print("整型数组:");
for (int i = 0; i arrInt.length; i++) {
System.out.print(arrInt[i] + "\t");
}
System.out.println();
/**
*
* （2）查找数组中最大值最小值以及求平均值
*/
int max = 0;
int min = arrInt[0];
double sum = 0;
for (int i = 0; i arrInt.length; i++) {
if (arrInt[i] max) {
max = arrInt[i];
}
if (arrInt[i] min) {
min = arrInt[i];
}
sum += arrInt[i];
}
double avg = sum / arrInt.length;
System.out.println("最大值：" + max);
System.out.println("最小值：" + min);
System.out.println("平均值：" + avg);
/**
*
* （3）实现数组的排序，有用户选择何种方式
*/
System.out.println("请选择排序的方式(输入数字即可)：");
System.out.println("1：由小到大，2：由大到小");
int a = input.nextInt();
switch (a) {
case 1:
int i,
j,
t;
for (i = 0; i arrInt.length - 1; i++) {
for (j = 0; j arrInt.length - i - 1; j++) {
if (arrInt[j + 1] arrInt[j]) {
t = arrInt[j + 1];
arrInt[j + 1] = arrInt[j];
arrInt[j] = t;
}
}
}
break;
case 2:
int x,
y,
z;
for (x = 0; x arrInt.length - 1; x++) {
for (y = 0; y arrInt.length - x - 1; y++) {
if (arrInt[y + 1] arrInt[y]) {
z = arrInt[y + 1];
arrInt[y + 1] = arrInt[y];
arrInt[y] = z;
}
}
}
break;
default:
System.out.println("输入有误");
break;
}
for (int k = 0; k arrInt.length; k++) {
System.out.print(arrInt[k] + "\t");
}
System.out.println();
/**
*
* （4）实现数组的插入，并对插入后的数组重排序
*/
System.out.println("该数据长度为" + arrInt.length + ",插入数据后也记录最后" + "个的元素");
boolean ref = true;
do {
System.out.println("请插入元素：");
for (int i = 0; i arrInt.length; i++) {
if (i arrInt.length - 1)
arrInt[i] = arrInt[i + 1];
else
arrInt[i] = input.nextInt();
}
System.out.println("是否再插入新的元素？(是：Y,否：其他任何字符)");
if (!input.next().equalsIgnoreCase("y")) {
ref = false;
}
} while (ref);
System.out.print("插入元素后的数组：");
for (int i = 0; i arrInt.length; i++) {
System.out.print(arrInt[i] + "\t");
}
System.out.println();
/**
*
* （5）实现对某个数组的删除或者修改操作
*/
System.out.println("请选择操作：1.删除；2.修改");
int d = input.nextInt();
System.out.println("请输入要操作的元素下标：(输入0-" + (arrInt.length - 1)
+ "之内的数字即可):");
int index = input.nextInt();
System.out.println(index);
int[] arrs = new int[arrInt.length - 1];
switch (d) {
case 1:
for (int i = 0; i arrInt.length - 1; i++) {
if (i == index index arrInt.length - 1) {
arrs[i] = arrInt[index + 1];
} else if (i index index arrInt.length - 1) {
arrs[i] = arrInt[i + 1];
} else {
arrs[i] = arrInt[i];
}
}
for (int i = 0; i arrs.length; i++) {
System.out.print(arrs[i] + "\t");
}
break;
case 2:
System.out.println("请输入新的元素：");
int num = input.nextInt();
arrInt[index] = num;
for (int i = 0; i arrInt.length; i++) {
System.out.print(arrInt[i] + "\t");
}
break;
default:
System.out.println("输入有误");
break;
}
}
public class Beetle extends Insect {
private int k = printInit("Beetle.k initialized");
public Beetle(){
System.out.println("k = " +k);
System.out.println("j = " + j);
}
private static int x2 = printInit("static Beetle.x2 initialized");
public static void main(String[] args){
System.out.println("Beetle constructor");
Beetle b = new Beetle();
}
}
