設(shè)計(jì)要求：

設(shè)計(jì)一個(gè)計(jì)算器，用GUI畫(huà)出來(lái)一個(gè)圖形界面，有兩個(gè)輸入框，一個(gè)輸出框，有4個(gè)加減乘除按鈕，實(shí)現(xiàn)簡(jiǎn)單的加減乘除功能。

code：

import java.awt.*; import java.awt.event.*; import java.io.*; import java.util.*;public class cal extends Frame implements ActionListener {private Button plus,minus,mul,div;private TextField Text1,Text2,Text3;private int a,b;public cal(){super("計(jì)算器小程序");plus=new Button("+");minus=new Button("-");mul=new Button("*");div=new Button("/");Text1=new TextField("輸入第一個(gè)數(shù)",20);Text2=new TextField("輸入第二個(gè)數(shù)",20);Text3=new TextField("結(jié)果",20);//Text1.setEditable(false); this.setSize(300,200);this.setBackground(Color.blue);this.setLocation(300,240);this.setLayout(new FlowLayout(FlowLayout.LEFT));this.add(Text1);this.add(Text2);this.add(Text3);this.add(plus); this.add(minus); this.add(mul);this.add(div);plus.addActionListener(this);minus.addActionListener(this);mul.addActionListener(this);div.addActionListener(this);this.addWindowListener(new Wadapt());this.setVisible(true); }public void actionPerformed(ActionEvent e){a = Integer.parseInt(Text1.getText());b = Integer.parseInt(Text2.getText());if(e.getSource()==plus){String s = String.valueOf(a+b);Text3.setText(s);}else if(e.getSource()==minus){String s = String.valueOf(a-b);Text3.setText(s);}else if(e.getSource()==mul){String s = String.valueOf(a*b);Text3.setText(s);}else if(e.getSource()==div){if (b==0) {Text3.setText("不合法的數(shù)據(jù)！");}else {String s = String.valueOf(a/b);Text3.setText(s);}} }public static void main(String args[]){cal mycal=new cal();} } class Wadapt extends WindowAdapter {public void windowClosing(WindowEvent evt){Frame frm=(Frame)evt.getSource();frm.setVisible(false);frm.dispose();System.exit(0);} }

總結(jié)

以上是生活随笔為你收集整理的java 设计作业——简单计算器的全部?jī)?nèi)容，希望文章能夠幫你解決所遇到的問(wèn)題。

如果覺(jué)得生活随笔網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔推薦給好友。