usenumbertextfielddemo.java

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package editor;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class UseNumberTextFieldDemo extends JFrame {

  JPanel contentPane = new JPanel();
  JLabel jLabel1 = new JLabel();
  FlowLayout flowLayout1 = new FlowLayout();
  //创建数字编辑框，初始化的数值是0
  NumberTextField jTextField1 = new NumberTextField("0");
  NumberTextField jTextField2 = new NumberTextField("0");

  public UseNumberTextFieldDemo() {
    try {
      //窗口关闭时清空内存
      setDefaultCloseOperation(EXIT_ON_CLOSE);
      jbInit();
    }
    catch (Exception e) {}
  }

  public static void main(String[] args) {
    UseNumberTextFieldDemo frame = new UseNumberTextFieldDemo();
    frame.setVisible(true);
  }

  private void jbInit() throws Exception {
    contentPane = (JPanel)this.getContentPane();
    setTitle("应用数字编辑框示例");
    setSize(new Dimension(420, 110));
    contentPane.setLayout(flowLayout1);
    //设置标签的标题
    jLabel1.setText("编辑框只能输入数字:");
    //设置编辑框的大小
    jTextField1.setPreferredSize(new Dimension(100, 30));
    jTextField2.setPreferredSize(new Dimension(100, 30));
    //向容器加入各个控件
    contentPane.add(jLabel1, null);
    contentPane.add(jTextField1, null);
    contentPane.add(jTextField2, null);
  }
}