admin管理员组文章数量:1516870
目录
3.43
import java.io.*;
import java.awt.*;
import java.awt.event.* ;
//**********found**********
import javax.swing.*;
public class Java_3 implements ActionListener {
JTextArea ta;
JFrame f ;
JLabel label;
JButton bs,br;
public static void main(String[ ] args){
Java_3 t = new Java_3();
t.go();
}
void go(){
f = new JFrame("Save data");
f.setSize( 20, 400);
//**********found**********
f.setLayout(new FlowLayout());
label = new JLabel("请输入需要保存的文本 ：");
ta = new JTextArea(3,20);
bs = new JButton("保存");
br = new JButton("读取");
f.add(label);
f.add(ta);
f.add(bs);
f.add(br);
//**********found**********
bs.addActionListener(this);
//**********found**********
br.addActionListener(new ReadFile());
f.setSize(400,400);
f.pack( );
f.setVisible(true) ;
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent event){
try{
FileWriter out = new FileWriter("out.txt");
String str = ta.getText();
//**********found**********
out.write(str);
out.close();
} catch( Exception e){
}
ta.setText(" ");
}
class ReadFile implements ActionListener{
public void actionPerformed(ActionEvent event){
String cc;
StringBuffer str = new StringBuffer("");
try{
FileReader in = new FileReader("out.txt");
//**********found**********
BufferedReader bin= new BufferedReader(in);
while ( (cc = bin.readLine())!= null)
str.append(cc);
bin.close();
ta.setText(str.toString());
} catch( Exception e){ }
}
}
}
3.44
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
//**********found**********
public class Java_3 extends JFrame {
private JTextField username;
private JPasswordField password;
private JLabel jl1;
private JLabel jl2;
private JLabel jl3;
private JLabel jl4;
private JButton bu1;
private JButton bu2;
private JButton bu3;
private JCheckBox jc1;
private JCheckBox jc2;
private JComboBox jcb;
public Java_3() {
this.setTitle("QQ2022正式版");
//**********found**********
init();
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// 设置布局方式为绝对定位
this.setLayout(null);
this.setBounds(0, 0, 355, 265);
// 设置窗体的标题图标
Image image = new ImageIcon("a.png").getImage();
this.setIconImage(image);
// 窗体大小不能改变
this.setResizable(false);
// 居中显示
this.setLocationRelativeTo(null);
this.setVisible(true);
}
public void init() {
//**********found**********
Container con = this.getContentPane();
jl1 = new JLabel();
// 设置背景图片
Image image1 = new ImageIcon("background.jpg").getImage();
jl1.setIcon(new ImageIcon(image1));
jl1.setBounds(0, 0, 355, 265);
jl2 = new JLabel();
Image image2 = new ImageIcon("a.gif").getImage();
jl2.setIcon(new ImageIcon(image2));
jl2.setBounds(40, 95, 50, 60);
username = new JTextField();
username.setBounds(50, 50, 150, 20);
jl3 = new JLabel("注册账号");
jl3.setBounds(210, 50, 70, 20);
password = new JPasswordField();
password.setBounds(50, 80, 150, 20);
jl4 = new JLabel("找回密码");
jl4.setBounds(210, 80, 70, 20);
jc1 = new JCheckBox("记住密码");
jc1.setBounds(125, 135, 80, 15);
jc2 = new JCheckBox("自动登录");
jc2.setBounds(215, 135, 80, 15);
jcb = new JComboBox();
jcb.addItem("在线");
jcb.addItem("隐身");
jcb.addItem("离开");
jcb.setBounds(40, 135, 55, 20);
//**********found**********
bu1 = new JButton("登录");
bu1.setBounds(250, 200, 65, 20);
//**********found**********
bu1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String str=e.getActionCommand();
if("登录".equals(str)){
String getName =username.getText();
JOptionPane.showConfirmDialog(null, "您输入的用户名是"+getName);
}
}
});
bu2 = new JButton("多账号");
bu2.setBounds(25, 200, 75, 20);
bu3 = new JButton("设置");
bu3.setBounds(140, 200, 65, 20);
// 所有组件用容器装载
jl1.add(jl2);
jl1.add(jl3);
jl1.add(jl4);
jl1.add(jc1);
jl1.add(jc2);
jl1.add(jcb);
jl1.add(bu1);
jl1.add(bu2);
jl1.add(bu3);
con.add(jl1);
con.add(username);
con.add(password);
}
public static void main(String[] args) {
Java_3 qq = new Java_3();
}
}
3.45
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Java_3 extends JFrame implements ActionListener{
JTextField nval = new JTextField(10);
//**********Found**********
JButton calcBtn = new JButton("计算") ;
JTextArea result = new JTextArea(10,20);
void initFrame(){
Container content = getContentPane();
JPanel calcPanel = new JPanel();
calcPanel.add(new JLabel("N值"));
//**********Found**********
calcPanel.add(nval);
calcPanel.add(calcBtn) ;
content.add(calcPanel,"North");
//**********Found**********
calcBtn.addActionListener(this);
content.add(result,"Center");
result. setEditable(false) ;
}
public Java_3(){
super("计算素数");
setSize(500,200);
initFrame();
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==calcBtn){
int N=Integer.parseInt(nval.getText());
int [] prime=new int[N/3+2];
prime[0]=2;prime[1]=3;
int k=2;
for(int m=5;m<=N;m+=2){
int j=1,isprime=1;
int kk=Math.round((float)Math.sqrt(m));
while(prime[j]<=kk){
if(m%prime[j]==0){
//**********Found**********
isprime=0;
break;
}else
//**********Found**********
j++ ;
}
if(isprime==1) prime[k++]=m;
}
//**********Found**********
String str="Total prime number: "+k ;
result.setText("");
result.append(str );
}
}
public static void main(String[] args){
new Java_3();
}
}3.46
//**********Found**********
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.net.*;
public class Java_3 extends JFrame {
public Java_3() {
//**********Found**********
setTitle("三国攻略游戏");
setBounds(650, 350, 650, 400);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
Container container = getContentPane();
setLayout(new BorderLayout());
JPanel p1 = new JPanel();
JLabel bxx = new JLabel("北京天下第一攻略游戏有限公司荣誉出品 ");
p1.add(bxx);
this.add(BorderLayout.SOUTH, p1);
bxx.setBackground(Color.white);
//**********Found**********
JMenuBar m = new JMenuBar();
setJMenuBar(m);
JMenu m1 = new JMenu("魏国");
JMenu m2 = new JMenu("蜀国");
JMenu m3 = new JMenu("吴国");
JMenu n1 = new JMenu("曹操");
JMenu n2 = new JMenu("夏侯惇");
JMenu n3 = new JMenu("司马懿");
JMenu n4 = new JMenu("刘备");
JMenu n5 = new JMenu("关羽");
JMenu n6 = new JMenu("赵云");
JMenuItem n31 = new JMenuItem("指挥能力");
JMenuItem n32 = new JMenuItem("战斗技能");
JMenuItem n33 = new JMenuItem("管理能力");
JMenuItem n21 = new JMenuItem("指挥能力");
JMenuItem n22 = new JMenuItem("战斗技能");
JMenuItem n23 = new JMenuItem("管理能力");
m.add(m1);
m.add(m2);
m.add(m3);
m1.add(n1);
m1.add(n2);
m1.add(n3);
m2.add(n4);
m2.add(n5);
m2.add(n6);
n4.add(n31);
n4.add(n32);
n4.add(n33);
n1.add(n21);
n1.add(n22);
n1.add(n23);
//**********Found**********
n31.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
JLabel l1 = new JLabel();
JLabel l2 = new JLabel();
JDialog dialog = new JDialog();
dialog.setLayout(new GridLayout(2, 1, 5, 5));
dialog.add(l1);
dialog.add(l2);
dialog.setModal(true);
dialog.setSize(354, 200);
dialog.setLocationByPlatform(true);
dialog.setTitle("刘备指挥能力");
dialog.setVisible(true);
}
});
//**********Found**********
n32.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
JLabel l1 = new JLabel();
JLabel l2 = new JLabel();
JDialog dialog = new JDialog();
dialog.setLayout(new GridLayout(2, 1, 5, 5));
dialog.add(l1);
dialog.add(l2);
dialog.setModal(true);
dialog.setSize(500, 400);
dialog.setLocationByPlatform(true);
dialog.setTitle("刘备战斗技能");
dialog.setVisible(true);
}
});
n33.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
JLabel l1 = new JLabel();
JLabel l2 = new JLabel();
JDialog dialog = new JDialog();
dialog.setLayout(new GridLayout(2, 1, 10, 10));
dialog.add(l1);
dialog.add(l2);
dialog.setModal(true);
dialog.setSize(500, 400);
dialog.setLocationByPlatform(true);
dialog.setTitle("刘备管理能力");
dialog.setVisible(true);
}
});
//**********Found**********
setVisible(true);
}
public static void main(String[] args) {
new Java_3();
}
}3.47
import java.io.*;
import java.awt.*;
import java.awt.event.* ;
import javax.swing.*;
//**********Found**********
public class Java_3 implements ActionListener {
JTextArea ta1,ta2;
JFrame f ;
JLabel label1,label2;
JButton bs,br;
//**********Found**********
char[] aa={'A','B','C','D','E'};
String ss;
public static void main(String args[ ]){
Java_3 t = new Java_3();
t.go();
}
void go(){
f = new JFrame("Data Input and Output");
f.setSize( 20, 200);
//**********Found**********
f.setLayout(new GridLayout(2,3,5,5));
label1 = new JLabel(" 数组内容：");
ta1 = new JTextArea(2,20);
ss=new String(aa);
ta1.setText(ss);
bs = new JButton("保存");
label2 = new JLabel(" 已保存：");
ta2 = new JTextArea(2,20);
br = new JButton("读取");
f.add(label1);
f.add(ta1);
f.add(bs);
f.add(label2);
f.add(ta2);
f.add(br);
bs.addActionListener(this);
//**********Found**********
br.addActionListener( new ReadFile() );
f.setSize(400,400);
f.pack( );
f.setVisible(true) ;
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent event){
try{
DataOutputStream out = new DataOutputStream(new FileOutputStream("out.txt"));
for (int i=0; i<=aa.length; i++)
//**********Found**********
out.writeChar(aa[i]);
out.close();
} catch( Exception e){ }
}
class ReadFile implements ActionListener{
public void actionPerformed(ActionEvent event){
int i=0;
char c;
char[] a1= new char[50];
String str ;
DataInputStream in;
try{
//**********Found**********
in = new DataInputStream( new FileInputStream("out.txt"));
while ( i<aa.length){
c = in.readChar();
a1[i++]=c;
}
in.close();
str = new String(a1);
ta2.setText(str);
} catch( Exception e){ }
}
}
}3.48
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Java_3 extends JFrame implements ActionListener
{
private double x=0;
private double y=0;
JTextField xval1 = new JTextField(10);
JTextField xval2 = new JTextField(10);
JButton calcBtn = new JButton("计算");
JTextArea result = new JTextArea(10,20);
void initFrame()
{
Container content = getContentPane();
content.setLayout(new BorderLayout());
JPanel calcPanel = new JPanel();
calcPanel.setLayout(new FlowLayout());
calcPanel.add(new JLabel("角度1"));
calcPanel.add(xval1);
//***************************Found*********************
calcPanel.add( new JLabel("角度2") );
calcPanel.add(xval2);
//***************************Found*********************
calcPanel.add(calcBtn);
content.add(calcPanel,"North");
calcBtn.addActionListener(this);
content.add(result,"Center");
//***************************Found*********************
result.setEditable(false);
}
public Java_3()
{
super("计算两角和余弦函数");
setSize(500,200);
initFrame();
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent e)
{
//***************************Found*********************
if (e.getSource()== calcBtn ){
x=Double.parseDouble(xval1.getText())/180*3.1415926;
//***************************Found*********************
x=x+Double.parseDouble( xval2.getText() )/180*3.1415926;
//***************************Found*********************
y= Math.cos(x);
String str="cos( ("+xval1.getText()+"+"+xval2.getText()+") *3.1415926/180)= "+y+'\n';
result. append(str) ;
}
}
public static void main(String[] args)
{
new Java_3();
}
}3.49
import java.io.*;
//**********Found**********
import java.awt.event.* ;
import javax.swing.*;
public class Java_3 {
static JTextArea ta;
JFrame frame ;
public static void main(String args[ ]){
Java_3 t = new Java_3();
//**********Found**********
t.frameAndMenu();
}
void frameAndMenu(){
frame = new JFrame();
frame.setSize(400,150);
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
JMenuBar menuBar = new JMenuBar();
//**********Found**********
JMenu menu = new JMenu("Menu");
JMenuItem menuItemReadFile = new JMenuItem("ReadFile");
//**********Found**********
menuItemReadFile.addActionListener( new ReadFile());
JMenuItem menuItemExit = new JMenuItem("Exit");
menuItemExit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
menu.add(menuItemReadFile);
menu.add(menuItemExit);
menuBar.add(menu);
frame.setJMenuBar(menuBar);
ta = new JTextArea(10,100);
frame.add(ta);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocation(600, 300);
frame.setVisible(true);
}
}
//**********Found**********
class ReadFile implements ActionListener{
public void actionPerformed(ActionEvent event){
String cc;
StringBuffer str = new StringBuffer("");
try{
FileReader in = new FileReader("java3.txt");
//**********Found**********
BufferedReader bin= new BufferedReader(in);
while ( (cc = bin.readLine())!= null)
str.append(cc);
bin.close();
Java_3.ta.setText(str.toString());
} catch( Exception e){ }
}
} 3.50
//**********Found**********
import java.io.*;
import java.awt.event.* ;
import javax.swing.*;
//**********Found**********
public class Java_3 implements ActionListener{
JTextArea ta;
JFrame frame ;
public static void main(String args[ ]){
Java_3 fr = new Java_3();
fr.frameAndMenu();
}
void frameAndMenu(){
frame = new JFrame();
frame.setSize(200,150);
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
JMenuBar menuBar = new JMenuBar();
JMenu menu = new JMenu("Menu");
JMenuItem menuItemSaveFile = new JMenuItem("SaveFile");
//**********Found**********
menuItemSaveFile.addActionListener(this);
JMenuItem menuItemExit = new JMenuItem("Exit");
//**********Found**********
menuItemExit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
menu.add(menuItemSaveFile);
menu.add(menuItemExit);
//**********Found**********
menuBar.add(menu);
frame.setJMenuBar(menuBar);
ta = new JTextArea(3,20);
frame.add(ta);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocation(600, 300);
frame.setVisible(true);
}
public void actionPerformed(ActionEvent event){
try{
FileWriter out = new FileWriter("java_3.txt");
//**********Found**********
String str = ta.getText();
out.write(str);
out.close();
} catch( Exception e){ }
ta.setText(" ");
}
}3.51
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Java_3 extends JFrame implements ActionListener{
private double x=0;
private double y=0;
JTextField xval = new JTextField(10);
JButton calcBtn = new JButton("计算");
JTextArea result = new JTextArea(10,20);
boolean isAngleRad=true;
JButton angleUnitBtn=new JButton("设成角度");
void initFrame(){
Container content = getContentPane();
content.setLayout(new BorderLayout());
JPanel calcPanel = new JPanel();
calcPanel.setLayout(new FlowLayout());
//***************************Found*********************
calcPanel.add( new JLabel("角的值") );
calcPanel.add(xval);
calcPanel.add(calcBtn) ;
calcPanel.add(angleUnitBtn);
content.add(calcPanel,"North");
calcBtn.addActionListener(this);
//***************************Found*********************
angleUnitBtn.addActionListener(this) ;
content.add(result,"Center");
//***************************Found*********************
result.setEditable(false);
}
public Java_3(){
super("计算余弦函数");
setSize(500,200);
initFrame();
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent e){
if (e.getSource()== calcBtn){
String str;
if(isAngleRad) {
x=Double.parseDouble(xval.getText());
str="cos("+x+")=";
}else {
x=Double.parseDouble(xval.getText())/180*3.1415926;
//***************************Found*********************
str="cos("+xval.getText() +"*3.14159/180)=";
};
y=Math.cos(x);
result.append(str+y+'\n');
}else if(e.getSource()== angleUnitBtn){
if(isAngleRad)
angleUnitBtn.setText("设成弧度");
else
//***************************Found*********************
angleUnitBtn.setText( "设成角度");
//***************************Found*********************
isAngleRad= !isAngleRad ;
}
}
public static void main(String[] args){
new Java_3();
}
}3.52
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Java_3 {
public static void main(String[] args) {
JFrame f = new JFrame("计算");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new MyPanel());
f.setSize(300, 130);
//**********Found**********
f.setVisible(true);
}
}
class MyPanel extends JPanel {
JTextField t1, t2;
JButton b1, b2;
JLabel l1, l3;
MyPanel() {
setLayout(new BorderLayout());
t1 = new JTextField(5);
t2 = new JTextField(5);
l1 = new JLabel("op");
JLabel l2 = new JLabel("=");
l3 = new JLabel("00");
JPanel p1 = new JPanel();
p1.add(t1);
p1.add(l1);
p1.add(t2);
p1.add(l2);
p1.add(l3);
JPanel p2 = new JPanel();
b1 = new JButton("加");
b2 = new JButton("减");
p2.add(b1);
p2.add(b2);
add(p1, BorderLayout.CENTER);
//**********Found**********
add(p2, BorderLayout.SOUTH);
//**********Found**********
b1.addActionListener(new BListener() );
//**********Found**********
b2.addActionListener(new BListener() );
}
//**********Found**********
private class BListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
int a = 0, b = 0;
try {
//**********Found**********
a = Integer.parseInt(t1.getText() );
//**********Found**********
b = Integer.parseInt(t2.getText() );
} catch (Exception ee) {
}
//**********Found**********
if (e.getSource() == b1) {
l1.setText("+");
l3.setText(String.valueOf(a+b));
} else {
l1.setText("-");
l3.setText(String.valueOf(a-b));
}
}
}
}3.53
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Java_3 {
public static void main(String[] args) {
JFrame jFrame = new JFrame("测试窗口");
jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jFrame.setSize(300,120);
//**********Found**********
JPanel jPanel = new JPanel();
jFrame.add(jPanel);
jPanelDefault(jPanel);
//**********Found**********
jFrame.setVisible(true);
}
static JLabel jl = new JLabel("请输入：");
static JTextField jtf = new JTextField();
public static void jPanelDefault(JPanel jPanel){
jPanel.setLayout(null);
jl.setBounds(30, 10, 80, 20);
jPanel.add(jl);
jtf.setColumns(20);
jtf.setBounds(120, 10, 100,20);
jPanel.add(jtf);
JButton jb0 = new JButton("确认");
jb0.setBounds(60, 40, 60, 20);
//**********Found**********
jb0.addActionListener(new ActionListener() {
//**********Found**********
public void actionPerformed(ActionEvent e) {
//**********Found**********
JOptionPane.showMessageDialog(null, "保存成功：" + jtf.getText());
}
});
jPanel.add(jb0);
JButton jb1 = new JButton("取消");
jb1.setBounds(160, 40, 60, 20);
jb1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//**********Found**********
System.exit(0);
}
});
jPanel.add(jb1);
}
}3.54
import java.io.*;
import java.awt.*;
import java.awt.event.* ;
import javax.swing.*;
public class Java_3 implements ActionListener {
JTextArea ta1,ta2,ta3;
JFrame f ;
JLabel label1,label2;
JButton bs,br;
JPanel jp1,jp2;
String ss;
public static void main(String [ ]args){
Java_3 t = new Java_3();
t.go();
}
void go(){
f = new JFrame("Data Input and Output");
f.setLayout(new GridLayout(2,1));
label1 = new JLabel("姓名： ");
ta1 = new JTextArea(1,10);
bs = new JButton("保存到文件");
label2 = new JLabel(" 电话： ");
ta2 = new JTextArea(1,15);
ta3 = new JTextArea(1,25);
br = new JButton("读取并确认");
jp1 = new JPanel();
jp2 = new JPanel();
jp1.add(label1);
jp1.add(ta1);
jp1.add(label2);
jp1.add(ta2);
jp1.add(bs);
//**********Found**********
f.add(jp1);
jp2.add(ta3);
jp2.add(br);
f.add(jp2);
//**********Found**********
bs.addActionListener(this);
//**********Found**********
br.addActionListener( new ReadFile());
f.pack( );
f.setLocationRelativeTo(null);
f.setVisible(true) ;
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent event){
try{
//**********Found**********
FileWriter fw = new FileWriter(out.txt);
BufferedWriter bf = new BufferedWriter(fw);
ss=ta1.getText();
bf.write(ss,0,ss.length());
bf.newLine();
ss=ta2.getText();
bf.write(ss,0,ss.length());
bf.close();
} catch( Exception e){
}
}
class ReadFile implements ActionListener{
public void actionPerformed(ActionEvent event){
int i=0;
char c;
char[] a1= new char[50];
String str ;
try{
BufferedReader in = new BufferedReader( new FileReader("out.txt"));
//**********Found**********
ss=in.readLine();
str = " 姓名：" +ss;
str = str+" 电话："+in.readLine();
in.close();
//**********Found**********
ta3.setText(str);
} catch( Exception e){ }
}
}
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