JAVA swing怎么加入文本框

import javax.swing.JButton

import javax.swing.JFrame

import javax.swing.JTextField

public class MyJFrame {

/源码纤**

* @param args

*/

public static void main(String[] args) {

/雹仿模册/ TODO Auto-generated method stub

JFrame mainFrame = new JFrame("Cool TextField")

mainFrame.setLayout(null)

JButton jb = new JButton("ce")

JTextField jf = new JTextField()

jb.setBounds(80, 0, 20, 30)

jb.setVisible(true)

jf.setVisible(true)

jf.add(jb)

jf.setBounds(5, 50, 100, 30)

mainFrame.getContentPane().add(jf)

mainFrame.pack()

mainFrame.setVisible(true)

mainFrame.setBounds(100, 100, 200, 200)

}

}

只要文本框添加监听拆李链即扰闭可，用ActionListener即会在文本框中按下回车键时触发事件。

下面是监听的旅孙代码：

public void actionPerformed(ActionEvent e)

{

Object o=e.getSource()

if(o==text1) //文本框一号

{

text2.requestFocus()//文本框2号，请求焦点

}

else if(o==text2)

{

text3.requestFocus()

}

}

程序如下：

import java.awt.FlowLayout

import java.awt.Toolkit

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.JTextField

public class MyFrame extends JFrame implements ActionListener

{

private JButton button

private JTextField textField

private JLabel label

public MyFrame()

{

button = new JButton("Hello world")

textField = new JTextField(15)

label = new JLabel("输入内容：")

setTitle("Simple-Frame")

setBounds((Toolkit.getDefaultToolkit().getScreenSize().width - 500)/2,

(Toolkit.getDefaultToolkit().getScreenSize().height - 300)/2

, 500, 300)

setLayout(new FlowLayout())

add(label)

add(textField)

add(button)

setResizable(false)

setVisible(true)

this.button.addActionListener(this)

}

public static void main(String[] args)

{

new MyFrame()

}

@Override

public void actionPerformed(ActionEvent e)

{

if(e.getSource() == this.button)

{

this.textField.setText("Hello World")

}

}

}

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