锐客网

  1. 首页 > 睿知 > >

java编写计算器代码，怎么用java编写计算器

经验分享睿知

1 ， 怎么用java编写计算器代码长分几段：（一个类哦 。）import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Calculator extends JFrameprivate Container container; private GridBagLayout layout; private GridBagConstraints constraints; private JTextField displayField;// 计算结果显示区 private String lastCommand;// 保存+,-,*,/,=命令 private double result;// 保存计算结果 private boolean start;// 判断是否为数字的开始这是完整的程序自己去看吧package com.huabo;import java.awt.BorderLayout;import java.awt.Button;import java.awt.Color;import java.awt.FlowLayout;import java.awt.Frame;import java.awt.GridLayout;import java.awt.Panel;import java.awt.TextField;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class Computer extends Framepublic Computer()super("计算器");//给窗口布局BorderLayout borderlayout_frame = new BorderLayout();this.setLayout(borderlayout_frame);// 将窗口分成上下两部分Panel panel_north = new Panel();GridLayout panel_north1 = new GridLayout(2,1);//panel_north(panel_north);TextField textfield_top = new TextField("0.",30);textfield_top.setBackground(Color.lightGray);panel_north.add(textfield_top);Panel pancel_center = new Panel();this.add(panel_north ,BorderLayout.NORTH);this.add(pancel_center,BorderLayout.CENTER);//将第二部分成三部分BorderLayout borderlayout_center = new BorderLayout();pancel_center.setLayout(borderlayout_center);Panel panelcenter_north = new Panel();Panel panelcenter_west = new Panel();Panel panelcenter_center = new Panel();pancel_center.add(panelcenter_north,BorderLayout.NORTH);pancel_center.add(panelcenter_west,BorderLayout.WEST);pancel_center.add(panelcenter_center,BorderLayout.CENTER);
2，怎么用java编写计算器这是完整的程序自己去看吧package com.huabo;import java.awt.BorderLayout;import java.awt.Button;import java.awt.Color;import java.awt.FlowLayout;import java.awt.Frame;import java.awt.GridLayout;import java.awt.Panel;import java.awt.TextField;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class Computer extends Frame{public Computer(){super("计算器");//给窗口布局BorderLayout borderlayout_frame = new BorderLayout();this.setLayout(borderlayout_frame);// 将窗口分成上下两部分Panel panel_north = new Panel();GridLayout panel_north1 = new GridLayout(2,1);//panel_north(panel_north);TextField textfield_top = new TextField("0.",30);textfield_top.setBackground(Color.lightGray);panel_north.add(textfield_top);Panel pancel_center = new Panel();this.add(panel_north ,BorderLayout.NORTH);this.add(pancel_center,BorderLayout.CENTER);//将第二部分成三部分BorderLayout borderlayout_center = new BorderLayout();pancel_center.setLayout(borderlayout_center);Panel panelcenter_north = new Panel();Panel panelcenter_west = new Panel();Panel panelcenter_center = new Panel();pancel_center.add(panelcenter_north,BorderLayout.NORTH);pancel_center.add(panelcenter_west,BorderLayout.WEST);pancel_center.add(panelcenter_center,BorderLayout.CENTER);代码长分几段：（一个类哦 。）import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Calculator extends JFrame { private Container container; private GridBagLayout layout; private GridBagConstraints constraints; private JTextField displayField;// 计算结果显示区 private String lastCommand;// 保存+,-,*,/,=命令 private double result;// 保存计算结果 private boolean start;// 判断是否为数字的开始用事件，点＋号事件就触发加的方法就行，不要变量
3，怎么用Java编个简单计算器import java.awt.*;import javax.swing.*;import java.awt.event.*;class Counter extends WindowAdapter static JFrame f=new JFrame("计算器"); static JTextField text1=new JTextField("0."); static String source=""; static String cal=""; static String object=""; static boolean flag=false; static boolean flag1=true; static boolean flag2=false; public void init()tryContainer c=f.getContentPane(); JPanel pan1=new JPanel(); JButton b1=new JButton("1"); JButton b2=new JButton("2"); JButton b3=new JButton("3"); JButton b4=new JButton("4"); JButton b5=new JButton("5"); JButton b6=new JButton("6"); JButton b7=new JButton("7"); JButton b8=new JButton("8"); JButton b9=new JButton("9"); JButton b0=new JButton("0"); JButton b11=new JButton("+"); JButton b12=new JButton("-"); JButton b13=new JButton("*"); JButton b14=new JButton("/"); JButton b15=new JButton("."); JButton b16=new JButton("="); JButton bclar=new JButton("清零"); text1.setHorizontalAlignment(JTextField.RIGHT); c.add(text1,"North"); c.add(pan1); A aa=new A(); Result re=new Result(); Opertion op=new Opertion(); Clar cl=new Clar(); b1.addActionListener(aa); b2.addActionListener(aa); b3.addActionListener(aa); b4.addActionListener(aa); b5.addActionListener(aa); b6.addActionListener(aa); b7.addActionListener(aa); b8.addActionListener(aa); b9.addActionListener(aa); b0.addActionListener(aa); b11.addActionListener(op); b12.addActionListener(op); b13.addActionListener(op); b14.addActionListener(op); b16.addActionListener(re); b15.addActionListener(aa); bclar.addActionListener(cl); pan1.add(b1); pan1.add(b2); pan1.add(b3); pan1.add(b11); pan1.add(b4); pan1.add(b5); pan1.add(b6); pan1.add(b12); pan1.add(b7); pan1.add(b8); pan1.add(b9); pan1.add(b13); pan1.add(b0); pan1.add(b15); pan1.add(b16); pan1.add(b14); pan1.add(bclar); f.setSize(200,220); f.setVisible(true); } catch(Exception e)System.out.println(e.getMessage()); } } class A implements ActionListenerpublic void actionPerformed(ActionEvent e)String a=text1.getText(); String s=e.getActionCommand(); if(a.equals("0.")||a.equals("+")||a.equals("-")||a.equals("*")||a.equals("/"))text1.setText(s); elseif(flag2)text1.setText(s); flag2=false; } else text1.setText(a+s); } } } class Opertion implements ActionListenerpublic void actionPerformed(ActionEvent e)cal=e.getActionCommand(); if(flag1==true)source=text1.getText(); text1.setText(cal); flag1=false; flag=true; } } class Result implements ActionListenerpublic void actionPerformed(ActionEvent e)double num1; num1=Double.parseDouble(source); object=text1.getText(); double num2; num2=Double.parseDouble(object); double result=0; if(cal.equals("+")) result=num1+num2; if(cal.equals("-")) result=num1-num2; if(cal.equals("*")) result=num1*num2; if(cal.equals("/")) if(num2==0) text1.setText("除数不能为0"); else result=num1/num2; String s1=Double.toString(result); text1.setText(s1); flag1=true; flag2=true; } } class Clar implements ActionListenerpublic void actionPerformed(ActionEvent e)text1.setText("0."); } } public static void main(String[] args)Counter count=new Counter(); count.init(); } public void windowClosing(WindowEvent e) System.exit(1); } public void windowOpened(WindowEvent e) public void windowIconified(WindowEvent e) public void windowDeiconified(WindowEvent e) public void windowClosed(WindowEvent e) public void windowActivated(WindowEvent e) public void windowDeactivated(WindowEvent e)}【java编写计算器代码，怎么用java编写计算器】

    推荐阅读


    上一篇：编程软件培训班，it软件编程培训

    下一篇：360游戏盒子,996游戏盒子app