用java编写的简易计算器实验报告
实现计算器的加、减、乘、除等基本功能,参考Windows计算器增加多种功能,并处理异常。
private JTextArea text;//输入框
private JButton buttonBackspace,buttonCE,buttonC;//结果操作键
private JButton btn1,btn2,btn3,btn4,btn5,btn6,btn7,btn8,btn9,btn0;//数字键
private JButton btnMC,btnMR,btnMS,btnMAdd,btnMSub;//存储操作键
private JButton btnPlus,btnMinus,btnDivide,btnMultiply,btnEqual;//加减乘除等号键
private JButton btnPercent,btnSqrt,btnNegtive,btnReciprocal,btnDot;//"%",开方,"+/-",倒数,小数点
……
MainFrame()
{
super("计算器");
setBounds(100,100,335,310);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.getContentPane().setLayout(new FlowLayout(FlowLayout.RIGHT));
panel=new JPanel();
panel2=new JPanel();
gridpanelM=new JPanel();
gridpanelR=new JPanel();
gridpanelN=new JPanel();
panel.setLayout(new BorderLayout(5,5));//水平垂直间距
panel2.setLayout(new BorderLayout(5,5));
gridpanelM.setLayout(new GridLayout(1,5,5,5));
gridpanelR.setLayout(new GridLayout(1,3,5,5));
gridpanelN.setLayout(new GridLayout(4,5,5,5));
panel.add(gridpanelR,BorderLayout.NORTH);
panel.add(panel2,BorderLayout.CENTER);
panel2.add(gridpanelM,BorderLayout.NORTH);
panel2.add(gridpanelN,BorderLayout.CENTER);
this.getContentPane().add(text,BorderLayout.NORTH);
this.getContentPane().add(panel,BorderLayout.SOUTH;
………………
}
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