findmin.java

来自「Java程序设计实用教程源代码 本书源代码按章分别放置在不同的文件夹中,所有程」· Java 代码 · 共 42 行

import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class FindMin
    extends Applet implements ActionListener {
  Label result;
  TextField num1, num2, num3;
  Button btn;
  int x = 0, y = 0, z = 0, min;
  public void init() {
    result = new Label("请以上文本框中输入3个待比较的整数：");
    num1 = new TextField(5);
    num2 = new TextField(5);
    num3 = new TextField(5);
    btn = new Button("比较");
    add(num1);
    add(num2);
    add(num3);
    add(btn);
    add(result);
    btn.addActionListener(this);
  }

  public void actionPerformed(ActionEvent e) {
    x = Integer.parseInt(num1.getText());
    y = Integer.parseInt(num2.getText());
    z = Integer.parseInt(num3.getText());
    if (x < y)
      if (x < z)
        min = x;
      else
        min = z;
    else
    if (y < z)
      min = y;
    else
      min = z;
    result.setText("三个数中的最小值为：" + min);
  }
}