用java編寫的簡易計算器實驗報告 實現計算器的加、減、乘、除等基本功能，參考Windows計算器增加多種功能，并處理異常。 private JTextArea text;//輸入框 private JButton buttonBackspace,buttonCE,buttonC;//結果操作鍵 private JButton btn1,btn2,btn3,btn4,btn5,btn6,btn7,btn8,btn9,btn0;//數字鍵 private JButton btnMC,btnMR,btnMS,btnMAdd,btnMSub;//存儲操作鍵 private JButton btnPlus,btnMinus,btnDivide,btnMultiply,btnEqual;//加減乘除等號鍵 private JButton btnPercent,btnSqrt,btnNegtive,btnReciprocal,btnDot;//"%",開方,"+/-",倒數,小數點 …… MainFrame() { super("計算器"); 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));//水平垂直間距 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; ……………… }