JAVA GUI代碼問(wèn)題

import?java.awt.*;

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import?java.awt.event.*;

import?javax.swing.*;

class?aa?implements?ActionListener?{

JButton?jb;

public?aa(JButton?jb)?{//構(gòu)造器,把JButton傳遞進(jìn)來(lái),

this.jb?=?jb;

}

public?void?actionPerformed(ActionEvent?e)?{

jb.setVisible(false);//設(shè)置jbutton不可見(jiàn)

}

}

public?class?J1?extends?JFrame{

JButton?j1?=?new?JButton("Game1");

JButton?j2?=?new?JButton("Game2");

J1(){

setTitle("Game");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container?c?=?getContentPane();

c.setLayout(new?FlowLayout());

c.add(j1);

c.add(j2);

j1.addActionListener(new?aa(j1));//把j1這個(gè)按鈕傳遞進(jìn)過(guò)去

j2.addActionListener(new?aa(j2));//把j2這個(gè)按鈕傳遞進(jìn)過(guò)去

setSize(400,400);

setVisible(true);

}

public?static?void?main(String[]?args)?{

new?J1();

}

}

效果圖

編寫(xiě)一個(gè)java GUI程序（其實(shí)幫我改改）

把frame=new subJFrame("DrawShapes");改成frame=new JFrame("DrawShapes");

程序基本沒(méi)問(wèn)題，在public void paint(Graphics g)中加上如下程序就可以了。

public void paint(Graphics g){

switch(i){

case 1: g.drawOval(20,20,40,40);break;

case 2: g.drawRect(20,20,40,40);break;

case 3: g.drawOval(20,30,40,50);break;

case 4: g.drawLine(20,20,40,40);break;

}

}

幫我看看這段Java GUI代碼

你好，在構(gòu)造方法FrameOut()中調(diào)用setLayout()方法加入一種控件布局形式，例如加入setLayout(new FlowLayout());即可以流布局的形式顯示控件。

完整代碼如下：

import java.awt.*;

import java.awt.event.*;

public class ApplicationInOut{

public static void main(String args[ ]){

new FrameInOut();

}

}

class FrameInOut extends Frame implements ActionListener{

Label prompt;

TextField input,output;

FrameInOut( ){

super("圖形界面的Java Application程序");

prompt=new Label("Java 是面向?qū)ο蟮恼Z(yǔ)言嗎？");

input=new TextField(6);

output=new TextField(20);

add(prompt);

add(input);

add(output);

input.addActionListener(this);

setLayout(new FlowLayout()); //此處即為添加布局形式

setSize(800,600);

setVisible(true); //show( );

}

public void actionPerformed(ActionEvent e){

output.setText(input.getText()+"OK!");

}

}

JAVA GUI 代碼問(wèn)題

import?java.awt.Container;

import?java.awt.FlowLayout;

import?java.awt.event.ActionEvent;

import?java.awt.event.ActionListener;

import?javax.swing.JButton;

import?javax.swing.JFrame;

import?javax.swing.JLabel;

import?javax.swing.SwingUtilities;

class?aa?implements?ActionListener

{

JButton?a,?b;

public?aa(JButton?c,?JButton?d)

{

a?=?c;

b?=?d;

}

public?void?actionPerformed(ActionEvent?e)

{

a.setVisible(false);

b.setVisible(false);

}

}

public?class?J1?extends?JFrame

{

private?static?final?long?serialVersionUID?=?1L;

JButton?j1?=?new?JButton("Game1");

JButton?j2?=?new?JButton("Game2");

JButton?j3?=?new?JButton("點(diǎn)擊搖骰子");

J1()

{

setTitle("Game");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setSize(400,?400);

setVisible(true);

final?Container?c?=?getContentPane();

c.setLayout(new?FlowLayout());

c.add(j1);

c.add(j2);

j1.addActionListener(new?ActionListener()

{

public?void?actionPerformed(ActionEvent?arg0)

{

c.add(new?JLabel("Game1"));

j3.setVisible(true);

c.add(j3);

}

});

j1.addActionListener(new?aa(j1,?j2));

j2.addActionListener(new?aa(j1,?j2));

j3.addActionListener(new?ActionListener()

{

public?void?actionPerformed(ActionEvent?e)

{

int?a?=?(int)?(Math.random()?*?6);

switch(a)

{

case?0:

c.add(new?JLabel("1"));

break;

case?1:

c.add(new?JLabel("2"));

break;

case?2:

c.add(new?JLabel("3"));

break;

case?3:

c.add(new?JLabel("4"));

break;

case?4:

c.add(new?JLabel("5"));

break;

case?5:

c.add(new?JLabel("6"));

break;

}

SwingUtilities.updateComponentTreeUI(c);

}

});

}

public?static?void?main(String[]?args)

{

new?J1();

}

}

用JAVA編寫(xiě)一個(gè)GUI記事本程序，實(shí)現(xiàn)文本的輸入，保存，修改，打開(kāi)操作

代碼如下：

import?java.io.*;

import?java.awt.*;

import?java.awt.event.*;

public?class?jtxtfm{

public?static?void?main(String?args[]){

jtxtfrm?fm=new?jtxtfrm();

}

}

class?jtxtfrm?extends?Frame?implements?ActionListener{

FileDialog?op,sv;

Button?btn1,btn2,btn3;

TextArea?tarea;

jtxtfrm(){

super("讀寫(xiě)文件");

setLayout(null);

setBackground(Color.cyan);

setSize(600,300);

setVisible(true);

btn1=new?Button("打開(kāi)");

btn2=new?Button("保存");

btn3=new?Button("關(guān)閉");

tarea=new?TextArea("");

add(btn1);add(btn2);add(btn3);add(tarea);

tarea.setBounds(30,50,460,220);

btn1.setBounds(520,60,50,30);

btn2.setBounds(520,120,50,30);

btn3.setBounds(520,180,50,30);

op=new?FileDialog(this,"打開(kāi)",FileDialog.LOAD);

sv=new?FileDialog(this,"保存",FileDialog.SAVE);

btn1.addActionListener(this);

btn2.addActionListener(this);

btn3.addActionListener(this);

addWindowListener(

new?WindowAdapter(){

public?void?windowClosing(WindowEvent?e){

setVisible(false);

System.exit(0);

}

}????

);

}

public?void?actionPerformed(ActionEvent?e){

if(e.getSource()==btn1){

String?str;

op.setVisible(true);

try{

File?f1=new?File(op.getDirectory(),op.getFile());

FileReader?fr=new?FileReader(f1);

BufferedReader?br=new?BufferedReader(fr);

tarea.setText("");

while((str=br.readLine())!=null)tarea.append(str+'\n');

fr.close();

}

catch(Exception?e1)

{}

}

if(e.getSource()==btn2){

sv.setVisible(true);

try{

File?f1=new?File(sv.getDirectory(),sv.getFile());

FileWriter?fw=new?FileWriter(f1);

BufferedWriter?bw=new?BufferedWriter(fw);

String?gt=tarea.getText();

bw.write(gt,0,gt.length());

bw.flush();

fw.close();

}

catch?(?Exception?e2)

{}

}

if(e.getSource()==btn3){

System.exit(0);

}

}

}

效果圖：