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   源码介绍

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使用java语言编译一个计算器，实验加减乘除基本功能

public class MyComputer extends JFrame implements ActionListener{

JTextArea memoryArea = new JTextArea("",1,3);

JTextArea dispresult = new JTextArea("0. ",1,20);
Font font=new Font("Arial Rounded Mt Bold ",Font.PLAIN,15);
JButton clear = new JButton("C");

JButton[]jbuttons= new JButton[28];

double result = 0, first = 0, second = 0;

double memery = 0;

char firstsymbol = '\0', secondsymbol='\0';

boolean prev = true, repeat = true, dot = true;

MyComputer()
{ 
super("Calculator");
try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

}catch(Exception e) {

System.out.print(e);
}
JPanel resultField = new JPanel();
JPanel buttonField = new JPanel();
Container all = getContentPane();
GridLayout grid1 = new GridLayout(4,6,3,3);
memoryArea.setEditable(false);
clear.addActionListener(this);

dispresult.setEditable(false);

resultField.add(memoryArea);

resultField.add(clear);

resultField.add(dispresult);

all.setLayout(new FlowLayout());

all.add(resultField);

String buttonname[] = {"sqrt","sin","MC","1","2","3"," ","log","cos","MR","4","5","6","-","x^2","tan","MS","7","8","9","x","x^3"," /-","M "
,"0",".","=","/"};

buttonField.setLayout(grid1);
for(int i=0;i<7;i ){
for(int j=0;j<4;j ) {
jbuttons[i*4 j] = new JButton(buttonname[i*4 j]);
jbuttons[i*4 j].addActionListener(this);//为按键注册监听器
buttonField.add(jbuttons[i*4 j]);

}

}

all.add(buttonField);

setSize(500,210);

setResizable(true);

setVisible(true);

}