package auto;import *;import java sql *;import java io *;import java util *;//import db *;public class test extends Thread{URL weburl;String urladdr;public test(){}public test(String urladdr URL weburl){this urladdr=urladdr;this weburl=weburl;}public test(String urladdr){try{this urladdr=urladdr;//weburl=new URL(urladdr);this start();}catch(Exception e){System out println(e toString());}}public InputStream getStream(String url){try{//urladdr=url;URL tempurl=new URL(url);return tempurl openStream();}catch(Exception e){System out println( hello );}return null;}public void run(){while(true){ try{getStream(urladdr);Thread sleep( );}catch(Exception e){}}}public String getStr(InputStream in){try{StringBuffer temp=null;BufferedReader buffer=new BufferedReader(new InputStreamReader(in));String tempstr= ;String strsum= ;while ((tempstr=buffer readLine())!=null){strsum=strsum+tempstr;}buffer close();//in close();return strsum;}catch(Exception e){System out println( shit );}return ;}public String getMTVURL(String ){ try{String temp= substring( lastIndexOf( / )+ );temp=temp substring( temp indexOf( \ ));temp= ?Id= ;+temp;temp=temp trim();return temp; }catch(Exception e){System out println(e toString());}return null;}public String getMTVname(String ){try{String temp= substring( indexOf( 作品名 )+ );temp=temp substring( temp indexOf( ));temp=temp trim();return temp;}catch(Exception e){System out println( hello );}return null;}public void insertdb(String MTVURL String MTVname){// DBoperate writer=new DBoperate();// String insert= insert into mtvList(mtvname mtvurl)values( +MTVname+ +MTVURL+ ) ;// writer exesql(insert);}public void getover(){InputStream in=getStream(urladdr);String content=getStr(in);String url=getMTVURL(content);String name=getMTVname(content);insertdb(url name);}public static void main(String[] avg){for(;;){try{test look=new test( ;);look getStream(look urladdr) close();Thread sleep( );}catch(Exception e){System out println(e toString());continue;}}}} lishixinzhi/Article/program/Java/hx/201311/26768
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自己纯手打，老半天才弄出来啊
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.util.Random;
import javax.swing.AbstractAction;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Demo2 extends JFrame {
private JLabel lb1, lb2, lb3, lb4; // 提示标签
private JTextField ta1, ta2;// 两个文本框
private JButton b1, b2, b3; // 三个按钮
private JPanel p1, p2; // 两个JPanel面板
public Demo2() {
// 初始化所有组件
lb1 = new JLabel("欢迎使用人机猜拳程序");
lb2 = new JLabel("你出拳： ");
lb3 = new JLabel("电脑出拳：");
lb4 = new JLabel("结果");
ta1 = new JTextField();
ta1.setPreferredSize(new Dimension(60, 60)); // 设置大小
ta1.setEditable(false);//设置不可编辑
ta2 = new JTextField();
ta2.setPreferredSize(new Dimension(60, 60));
ta2.setEditable(false);//设置不可编辑
b1 = new JButton("剪刀");
b2 = new JButton("石头");
b3 = new JButton("布");
p1 = new JPanel();
p2 = new JPanel();
// 设置第一个面板内容
Box box = Box.createVerticalBox();
Box box1 = Box.createHorizontalBox();
box1.add(lb2);
box1.add(ta1);
box1.add(lb3);
box1.add(ta2);
box.add(lb1);
box.add(Box.createVerticalStrut(40));
box.add(box1);
box.add(Box.createVerticalStrut(10));
box.add(lb4);
box.add(new JLabel());
p1.add(box);
// 设置第二个面板
p2.setLayout(new GridBagLayout()); // 使用GridBagLayout布局管理器
p2.setPreferredSize(new Dimension(0, 60));
GridBagConstraints g2 = new GridBagConstraints();
g2.fill = GridBagConstraints.BOTH;
g2.weightx = 1.0;
g2.weighty = 1.0;
g2.gridx = 0;
g2.gridy = 0;
p2.add(b1, g2);
g2.gridx = 1;
p2.add(b2, g2);
g2.gridx = 2;
p2.add(b3, g2);
//为3个按钮添加事件
b1.addActionListener(new buttonAction());
b2.addActionListener(new buttonAction());
b3.addActionListener(new buttonAction());
this.getContentPane().add(p1);
this.getContentPane().add(p2, BorderLayout.SOUTH);
this.setTitle("机器人猜拳游戏");
this.setSize(300, 300);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
//事件类
class buttonAction extends AbstractAction{
@Override
public void actionPerformed(ActionEvent e) {
if(e.getSource()==b1){
ta1.setText("剪刀");
init(ta1.getText());
}else if(e.getSource()==b2){
ta1.setText("石头");
init(ta1.getText());
}else if(e.getSource()==b3){
ta1.setText("布");
init(ta1.getText());
}
}
// 模拟电脑出拳，产生三个随机数。0代表剪刀，1代表石头，2代表布
public String getQuan(){
String str="";
int num=new Random().nextInt(3) ;
if(num==0){
str="剪刀";
}else if(num==1){
str="石头";
}else if(num==2){
str="布";
}
return str;
}
// 判断输赢方法
public String isying(String s1,String s2){
String s="";
if(s1.equals(s2)){
s="平局";
}else if(s1.equals("剪刀")s2.equals("布")){
s="你赢";
}else if(s1.equals("石头")s2.equals("剪刀")){
s="你赢";
}else if(s1.equals("布")s2.equals("石头")){
s="你赢";
}else{
s="电脑赢";
}
return s;
}
public void init(String wo){
String sy=""; // 保存输赢结果
String dncq=getQuan(); //电脑出拳
if(wo.equals(dncq)){
sy="平局";
}else if(wo.equals("剪刀")dncq.equals("布")){
sy="你赢";
}else if(wo.equals("石头")dncq.equals("剪刀")){
sy="你赢";
}else if(wo.equals("布")dncq.equals("石头")){
sy="你赢";
}else{
sy="电脑赢";
}
ta2.setText(dncq);// 电脑出拳
lb4.setText("结果："+sy);
}
}
public static void main(String[] args) {
new Demo2();
}
}
public class Bot {
private ArrayListString commands;
public Bot(){
commands = new ArrayList();
}
public ArrayListString getCommands(){
return commands;
}
public static void main(String[ ] args){
Bot bot = new Bot();
Scanner sc = new Scanner(System.in);
System.out.println("请输入一个整数：");
int n = sc.nextInt();
int i = 0;
String command;
sc.nextLine();
while (i n){
command = sc.nextLine();
if (!isCorrectCommand(command)){
System.out.println("每条指令只由L、R和数字组成（数字是0~100之间的整数）。");
}else if (command.length() 256){
System.out.println("每条指令的长度不超过256个字符。");
} else{
bot.getCommands().add(command);
i++;
}
}
i = 0;
while (i n){
System.out.printf("%.2f",bot.go(i));
i++;
}
}
public double go(int index){
int direction = 2;
double x = 0;
double y = 0;
String command = commands.get(index);
String str="0";
int i = 0;
char temp;
while (i command.length()){
temp = command.charAt(i);
if (temp = 47 temp = 57){
str += temp;
}else if (temp == 'L'){
int length = Integer.parseInt(str);
switch(direction){
case 1: x = x - length;break;
case 2: y = y + length;break;
case 3: x = x + length;break;
case 4: y = y - length;break;
}
str = "0";
direction = (direction - 1)%4;
if (direction == 0){
direction = 4;
}
}else{
int length = Integer.parseInt(str);
switch(direction){
case 1: x = x - length;break;
case 2: y = y + length;break;
case 3: x = x + length;break;
case 4: y = y - length;break;
}
str = "0";
direction = (direction + 1)%4;
}
i++;
}
int length = Integer.parseInt(str);
switch(direction){
case 1: x = x - length;break;
case 2: y = y + length;break;
case 3: x = x + length;break;
case 4: y = y - length;break;
}
return Math.sqrt(x * x + y * y);
}
public static boolean isCorrectCommand(String command){
Pattern pt = Pattern.compile("(?:L\\d{1,3}|R\\d{1,3}|\\d{1,3})+");
if (pt.matcher(command).matches()){
return true;
}
return false;
}
}
是这样的错误么？
Frist.java:5: cannot resolve symbol
symbol : class Scanner
location: class Frist
Scanner input=new Scanner(System.in);
Scanner是JDK1.5开始才有的
这样的错误是因为JDK版本不够，不支持。。。
我用的就是1.4.2 所以是这样的错误
