只要文本框添加监听即可,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")
}
}
}
新建个Test的文件import java.awt.*
import java.awt.event.*
public class Test implements ActionListener
{
Frame frame
TextField tx
Button b
public static void main(String args[])
{
(new Test()).display()
}
public void display()
{
tx=new TextField(
给的分有点少了,看看效果还满意吗?如果满意加分啊!O(∩_∩)O哈哈~import java.awt.Container
import java.awt.GridBagConstraints
import java.awt.GridBagLayout
import java.awt.Insets
import javax.swing.JButton
import javax.swing.JComboBox
import javax.swing.JFrame
import javax.swing.JScrollPane
import javax.swing.JTextArea
import javax.swing.JTextField
public class TextFile extends JFrame {
private Container c
private JTextField jtf//文本框
private JButton jb//按钮
private JComboBox jc//下拉框
private JTextArea jta//文本区
private JScrollPane jsp
public TextFile() {
this.setTitle("页面展示")
c = this.getContentPane()
GridBagLayout gridbag = new GridBagLayout()
GridBagConstraints gbc = new GridBagConstraints()
this.setLayout(gridbag)
jtf = new JTextField()
jb = new JButton("BUTTON开始")
String[] city = {"下拉框列表", "中国", "美国", "英国"}
jc = new JComboBox(city)
jta = new JTextArea()
jta.setRows(10)//设置文本区列数
jsp = new JScrollPane()
gbc.anchor = GridBagConstraints.NORTH// 当组件没有空间大时,使组件处在北部
gbc.fill = GridBagConstraints.HORIZONTAL
gbc.gridx = 0//横坐标
gbc.gridy = 0//纵坐标
gbc.gridwidth = 2//横占几个网格
jtf.setText("这里是文本框,显示一些东西")
gridbag.setConstraints(jtf, gbc)
c.add(jtf)
gbc.fill = GridBagConstraints.BOTH
gbc.insets = new Insets(10, 0, 0, 10)// 组件彼此的间距
gbc.gridx = 0
gbc.gridy = 1
gbc.gridwidth = 1
gbc.ipadx = 0// 组件内部填充空间,即给组件的最小宽度添加多大的空间
gbc.ipady = -100// 组件内部填充空间,即给组件的最小高度添加多大的空间
gridbag.setConstraints(jc, gbc)
c.add(jc)
gbc.insets = new Insets(10, 0, 10, 0)// 组件彼此的间距
gbc.gridx = 1
gbc.gridy = 1
gbc.gridwidth = 1
gbc.ipadx = 0// 组件内部填充空间,即给组件的最小宽度添加多大的空间
gbc.ipady = 0// 组件内部填充空间,即给组件的最小高度添加多大的空间
gridbag.setConstraints(jb, gbc)
c.add(jb)
jta.setText("这里输出内容,可以往下拉")
gbc.insets = new Insets(10, 0, 0, 0)// 组件彼此的间距
gbc.gridx = 0
gbc.gridy = 3
gbc.gridwidth = GridBagConstraints.REMAINDER
jsp.setViewportView(jta)
gridbag.setConstraints(jsp, gbc)
c.add(jsp)
this.pack()
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
this.setResizable(false)
this.setVisible(true)
}
public static void main(String[] args) {
new TextFile()
}
}
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