java中点击按钮的代码,java中点击按钮的代码有哪些

java中做一个按钮，点击按钮后画一个矩形的代码怎么写？

兄弟帮你写了一个：

import java.awt.Button;

import java.awt.Color;

import java.awt.Frame;

import java.awt.Graphics;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.util.Random;

public class Print {

public static void main(String[] args) {

new Te();

}

}

class Te extends Frame implements ActionListener {

Color cc = Color.red;

int x = -20, y = -50;

Random r = new Random();

public Te() {

this.setLayout(null);

Button b = new Button("画圆");

this.add(b);

b.setBounds(30,30,50,50);

b.addActionListener(this);

this.addWindowListener(new WindowAdapter () {

@Override

public void windowClosing(WindowEvent e) {

System.exit(0);

}

});

this.setBounds(200,200,500,400);

this.setVisible(true);

}

public void actionPerformed(ActionEvent e) {

this.cc = Color.red;

this.x = r.nextInt(400);

do {

int x1 = r.nextInt(300);

this.y = x1;

} while (this.y 50);

this.repaint();

}

@Override

public void paint(Graphics g) {

Color c = g.getColor();

g.setColor(cc);

g.drawRect(x,y,50,50);

g.setColor(c);

}

}

相关问答

Q1: Java中按钮事件代码 详请见下面

很简单嘛，代码如下

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

public class Test {

static JFrame jf1 = new JFrame("jf1");

static JFrame jf2 = new JFrame("jf2");

static JButton jb = new JButton("click");

public static void main(String[] args) {

jf1.add(jb);

jf1.setSize(200, 200);

jf2.setSize(200, 200);

jf1.setVisible(true);

jb.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e) {

jf2.setVisible(true);

}

});

}

}

Q2: java中点击一个按钮弹出两个输入文本框的源代码

写了一个很简单的案例,可以参考和修改

import java.awt.BorderLayout;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JDialog;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JTextField;

public class FromeDemo extends JFrame{

JButton jbutton;

public FromeDemo() {

jbutton = new JButton("弹出2个文本框");

jbutton.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

JDialog jd = new JDialog();

jd.setBounds(320, 180, 260, 100);

jd.setTitle("弹出文本框");

jd.getContentPane().setLayout(new GridLayout(2, 2));

jd.add(new JLabel("文本框一"));

jd.add(new JTextField(80));

jd.add(new JLabel("文本框二"));

jd.add(new JTextField(80));

jd.setModal(true);//确保弹出的窗口在其他窗口前面

jd.setVisible(true);

}

});

add(jbutton,BorderLayout.SOUTH);

setBounds(300, 100, 320, 320);

setTitle("测试");

setDefaultCloseOperation(EXIT_ON_CLOSE);

setVisible(true);

}

public static void main(String args[]) {

new FromeDemo();

}

}