如何使用Java对象语言编写一个加减乘除计算器要有代码

来源：学生作业帮编辑：灵鹊做题网作业帮分类：综合作业时间：2024/05/30 07:16:15

下面文件名要为：JiSuanQi.javaimport java.awt.*;import java.awt.event.*;public class JiSuanQi{ String s="",s1=null,s2=null; Frame f=new Frame("计算器"); TextField tf=new TextField(30); Panel p1=new Panel(); Panel p2=new Panel(); Panel p3=new Panel(); Button bt1=new Button("="); Button bt2=new Button("删除"); Button[] bt=new Button[16]; int id=0; public static void main(String[] args) { new JiSuanQi().init(); } public void init() { f.setBackground(new Color(85,247,253)); f.setLayout(new BorderLayout(4,4)); p2.setLayout(new GridLayout(4,4,4,4)); p3.setLayout(new BorderLayout(4,4)); f.setResizable(false); f.add(p1,BorderLayout.NORTH); f.add(p2); p3.add(bt2,BorderLayout.NORTH); p3.add(bt1); p1.add(tf); f.add(p3,BorderLayout.EAST); String[] b={"1","2","3","+","4","5","6","-","7","8","9","*","0",".","复位","/"}; for(int i=0;i<16;i++) { bt[i]=new Button(b[i]); p2.add(bt[i]); } bt[0].setForeground(Color.blue); bt[1].setForeground(Color.blue); bt[2].setForeground(Color.blue); bt[4].setForeground(Color.blue); bt[5].setForeground(Color.blue); bt[6].setForeground(Color.blue); bt[8].setForeground(Color.blue); bt[9].setForeground(Color.blue); bt[10].setForeground(Color.blue); bt[12].setForeground(Color.blue); bt[13].setForeground(Color.blue); bt[3].setForeground(Color.red); bt[7].setForeground(Color.red); bt[11].setForeground(Color.red); bt[15].setForeground(Color.red); bt[14].setForeground(Color.red); bt1.setForeground(Color.red); bt2.setForeground(Color.red); f.pack(); f.setVisible(true); f.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } } ); bt[0].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s+=1; s2+=1; tf.setText(s); } } ); bt[1].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s+=2; s2+=2; tf.setText(s); } } ); bt[2].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s+=3; s2+=3; tf.setText(s); } } ); bt[4].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s+=4; s2+=4; tf.setText(s); } } ); bt[5].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s+=5; s2+=5; tf.setText(s); } } ); bt[6].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s+=6; s2+=6; tf.setText(s); } } ); bt[8].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s+=7; s2+=7; tf.setText(s); } } ); bt[9].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s+=8; s2+=8; tf.setText(s); } } ); bt[10].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s+=9; s2+=9; tf.setText(s); } } ); bt[12].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s+=0; s2+=0; tf.setText(s); } } ); bt[13].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s+='.'; s2+='.'; tf.setText(s); } } ); bt[3].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s1=s; s+='+'; id=1; s2=""; tf.setText(s); } } ); bt[7].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s1=s; s+='-'; id=2; s2=""; tf.setText(s); } } ); bt[11].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s1=s; s+='*'; id=3; s2=""; tf.setText(s); } } ); bt[14].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s=""; s2=""; tf.setText(s); } } ); bt[15].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s1=s; s+='/'; id=4; s2=""; tf.setText(s); } } ); bt1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if(id<1) ; else{ s+='='; double a=Double.parseDouble(s1); double b=Double.parseDouble(s2); double c=0; switch(id) { case 1:c=a+b; break; case 2:c=a-b; break; case 3:c=a*b; break; case 4:c=a/b; break; } s+=c; tf.setText(s); } s="";s1="";s2="";id=0; } } ); bt2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { char[] c1; char[] c2=new char[s.length()-1]; c1=s.toCharArray(); for(int i=0;i<s.length()-1;i++) c2[i]=c1[i]; s=s.valueOf(c2); if(id<1) { s1=s; } if(s2.length()>=1) { char[] c3; char[] c4=new char[s2.length()-1]; c3=s2.toCharArray(); for(int i=0;i<s2.length()-1;i++) c4[i]=c3[i]; s2=s2.valueOf(c4); } tf.setText(s); } } ); }}

如何使用Java对象语言编写一个加减乘除计算器要有代码老师要求张浩使用面向对象的思想编写一个计算器类(Calculator),可以实现两个整数的加减乘除的运算.java 求简单java写计算器代码加减乘除用java语言编写一个简单计算器,并要实验报告和步骤说明. 用C语言编写一个简单的可以进行加减乘除运算混合运算的计算器用C语言编写一个简易计算器可实现加减乘除,连加连减,连乖连除. 单片机用C语言编写计算器如何实现大于65535的数字加减乘除?我使用的单片机的C语言仅仅支持2字节的数据变量,也就是最大用JAVA语言编写程序19.编写一个译码程序,把一个英语句子译成数字代码.译码规则是以数字 1代替字母 a,数 Java编写计算器的流程图采用java语言编写一个计算器,该计算器能对正数、负数（这里的正数、负数包括小数）进行加、减、乘、除运求写C语言计算器代码,要求加减乘除,求余数,阶乘,累加,排列,组合如何使用VB做个加减乘除的小计算器