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import javax.swing.*;
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import java.awt.*;
public class test extends JFrame{
public test(){
JButton button; //按钮
JLabel label; //标签
JComboBox combobox;//下拉菜单
JCheckBox checkbox;//复选框
JRadioButton radiobutton;//单选框
JTextField textfield;//文本框
button = new JButton("按钮");
label = new JLabel("标签：");
checkbox = new JCheckBox("复选框一");
radiobutton = new JRadioButton("单选框一");
combobox = new JComboBox();
textfield = new JTextField(100);
Container c = this.getContentPane();
c.setLayout(new FlowLayout());
c.add(button);
c.add(label);
c.add(checkbox);
c.add(radiobutton);
combobox.addItem("1");
combobox.addItem("2");
c.add(combobox);
c.add(textfield);
setSize(300, 200);
setVisible(true);
}
public static void main(String[] args) {
// TODO 自动生成方法存根
test mytest = new test();
}
}
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();
}
}
我给你写了一个简单的，实现了说的功能，并且还多加了一个按钮的清空事件，直接建一个类，把下面代码复制进去就行了，注意类名一致。
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JButton;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class WindowTest extends JFrame implements ActionListener, KeyListener
{
private static final long serialVersionUID = 1L;
/**
* 主方法
*/
public static void main(String[] args)
{
WindowTest win = new WindowTest();
}
/**
* 下面是具体实现
*/
JTextField text;
JButton button;
JEditorPane textArea;
public WindowTest()
{
super("测试窗体");
text = new JTextField(15);
text.addKeyListener(this);
JPanel p1 = new JPanel();
p1.add(new JLabel("输入字符："));
p1.add(text);
button = new JButton("清除");
button.addActionListener(this);
p1.add(button);
p1.setBounds(5, 5, 220, 100);
textArea = new JEditorPane();
textArea.setBounds(1, 1, 216, 200);
JPanel p2 = new JPanel();
p2.add(new JLabel("显示字符："));
p2.add(textArea);
p2.setBounds(5, 115, 340, 220);
JPanel p3 = new JPanel();
p3.add(p1);
p3.add(p2);
add(p3);
setBounds(160, 60, 400, 300);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
@Override
public void keyPressed(KeyEvent e)
{
}
@Override
public void keyReleased(KeyEvent e)
{
if (e.getKeyCode() == KeyEvent.VK_ENTER)
{
textArea.setText("");
}
else
{
String str = text.getText();
textArea.setText(str);
}
}
@Override
public void keyTyped(KeyEvent e)
{
}
@Override
public void actionPerformed(ActionEvent e)
{
text.setText("");
textArea.setText("");
}
}
package com.demo;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;
public class TimerTest {
private Timer timer;
private JTextField field;
private JButton button;
private boolean flag = true;
public TimerTest() {
timer = new Timer();
addview();
}
private void addview() {
JFrame frame = new JFrame("Timer test");
field = new JTextField();
field.setPreferredSize(new Dimension(0, 30));
button = new JButton("start");
button.setPreferredSize(new Dimension(100, 30));
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (flag) {
auto();
flag = false;
button.setText("stop");
} else {
timer.cancel();
flag = true;
button.setText("start");
}
}
});
frame.add(field, BorderLayout.CENTER);
frame.add(button, BorderLayout.EAST);
frame.setBounds(200, 200, 300, 60);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new TimerTest();
}
private void auto() {
timer.schedule(new TimerTask() {
@Override
public void run() {
int num = Integer.parseInt(field.getText().trim());
num += 1;
field.setText(num + "");
auto();
}
}, 1000);
}
}