mathexampleframe.java

介绍有关java的资料 课件 相当一本书籍 里面都是很基础的知识

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

public class MathExampleFrame extends Frame {
  Label label1 = new Label();
  TextField textField1 = new TextField();
  Button button1 = new Button();
  Button button2 = new Button();
  Button button3 = new Button();
  Label label2 = new Label();
  TextField textField2 = new TextField();

  public MathExampleFrame() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  public static void main(String[] args) {
    MathExampleFrame mathExampleFrame = new MathExampleFrame();
    mathExampleFrame.setTitle("求正弦、余弦值");
    mathExampleFrame.setSize(400,120);
    mathExampleFrame.show();
  }
  private void jbInit() throws Exception {
    label1.setText("输入数值：");
    label1.setBounds(new Rectangle(20, 30, 70, 30));
    this.setLayout(null);
    textField1.setText("0");
    textField1.setBounds(new Rectangle(100, 30, 90, 30));
    button1.setLabel("正弦");
    button1.setBounds(new Rectangle(20, 70, 70, 30));
    button1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    button2.setLabel("余弦");
    button2.setBounds(new Rectangle(150, 70, 70, 30));
    button2.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button2_actionPerformed(e);
      }
    });
    button3.setLabel("退出");
    button3.setBounds(new Rectangle(280, 70, 70, 30));
    button3.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button3_actionPerformed(e);
      }
    });
    label2.setText("结果：");
    label2.setBounds(new Rectangle(220, 30, 60, 30));
    textField2.setText("0");
    textField2.setBounds(new Rectangle(300, 30, 70, 30));
    this.add(textField1, null);
    this.add(button1, null);
    this.add(label2, null);
    this.add(textField2, null);
    this.add(button3, null);
    this.add(button2, null);
    this.add(label1, null);
  }

  void button1_actionPerformed(ActionEvent e) {
    textField2.setText(String.valueOf(Math.sin(Integer.parseInt(textField1.getText()))));
  }

  void button2_actionPerformed(ActionEvent e) {
    textField2.setText(String.valueOf(Math.cos(Integer.parseInt(textField1.getText()))));
  }

  void button3_actionPerformed(ActionEvent e) {
    System.exit(0);
  }
}