Java计算器源代码(已成功运行)汇总

1、Java计算器程序代码以下为代码：import avax.swmg.*;impoitjava.awt.*;impoitj ava.awt.event.*;public class Calculator extends JFrame unplements ActionListener private booleandotExist, operated, equaled; / 帮助运算的布尔变量private double stoiedNumbei; / 目前的结果 private chai lastOpeiator; / 表示上一 运算符 private JTextField opeiation

2、; / 结果栏private JButton dot plus, minus, multi, div, sqit, equal, changePN, clear; 运算符private JButton numbeis; / 数字/构造者public Calculatoi(setTitle(flCalculatorM;初始化变量dotExist = false; /表示当前的数是否有小数点operated = false; /表示任意运算符是否被按下equaled = false; /表示等号是否 被按下 stoiedNumbei = 0;lastOpeiator =初始化窗口变量operati

3、on = new JTextField(uOn;opeiation.setEditable(false;numbers = new JButton10;for (mti = 0; i< 10; i+numbersi = new JButton(,n 十 i;dot = newplus = new JButton(H+H；nuiius = new JButton(M-n;multi = new JButton(H*M;div = new JButton(17M;sqrt = new JButton(W”；equal = new JButton(M=n;changePN = new JBut

4、ton(M±M;cleai = new JButton(nACu;将窗口物体放入窗口GndBagLayout layout = new GndBagLayout(; getConteiitPane(.setLayout(layout;addComponent(layout, opeiation. 0, 0, 4, 1; addComponent(layout, numbeisl, 1, 0, 1,1; addComponent(layout, numbeis2, 1, 1, 1, 1; addComponent(layout, numbers3, 1, 2, 1, 1; addCom

5、ponent(layout, numbeis4, 2, 0, 1, 1; addComponent(layout, numbers5, 2, 1, 1, 1; addComponent(layout, numbeis65 2, 2, 1, 1; addComponent(layout, numbeis7, 3, 0, 1, 1; addComponent(layout, numbeis8, 3, 1, 1, 1;addComponent(layout, numbeis9, 3, 2, 1, 1; addComponent(layout, dot, 4, 0, 1, 1;addComponent

6、(layout, numbers05 4, 1, 1, 1; addComponent(layout, sqrt, 4, 2, 1, 1; addComponent(layout, plus, 1,3, 1, 1; addComponent(layout, minus, 2, 3, 1, 1;addComponent(layout, multi, 3, 3 J, 1; addComponent(layout, div, 4, 3, 1, 1; addComponent(layout, equal, 5, 0, 2, 1; addComponent(layout, changePN, 5, 2,

7、 1, 1; addComponent(layout, cleai; 5, 3, 1, 1; 对按钮进行反应的方法public void actioiiPeifdimed(ActionEvent e JButtonbtn = (JButtone.getSource(; if (btn = clearopeiation.setText(n0H;dotExist = false;stoiedNumbei = 0;lastOpeiator = ?;)else if (btn = equalopeiate(,=,;equaled = tine;)else if (btn = plusoperate(,

8、+,;equaled = false;)else if (btn = niuiusopeiate(1-1;equaled = false; else if (btn = multi operatef*1;equaled = false; else if (btn = div opeiate(V,;else if (btn = chaiigePN operate(,pl;operate(,=l;equaled = true; else if (btn = sqrt operate(,sl;operate(,=l; equaled = tme; else if (equaled stoiedNum

9、ber = 0; fbr (inti = 0; i< 10; i+ if (btn = numbeisi if (opeiation.getText(.equals(nOM opeiation.setText(,M,+ i; else i“！ operated operation.setText(opeiation.getText(+ i; else opeiation.setText(IH,+ i;operated = false; if (btn = dot && ! dotExist operation.setText(operation.getText(十”；do

10、tExist = tine; / 进行运算的方法 private void opeiate(chai operator doublecunentNumber Double.valueOf(opeiatioii.getText(.doubleValue(; if (lastOpeiatoi = stoiedNumber = cunentNumbei-; else if (lastOpeiatoi = "V stoiedNumbei +=cunentNumber; else if (lastOpeiatoi = stoiedNumber -= cunentNumber; else if

11、(lastOpeiatoi' = stoiedNumbei *= cunentNumber; else if (lastOpeiatoi = 7' stoiedNumber /= cunentNumbef； else if (lastOpeiatoi = 'p' stoiedNumbei *= -1;=else if (lastOpeiatoi = stoiedNumbei = Math. sqrt(cunentNumbei-; else if (lastOpeiatoi =&& equaled stoiedNumbei = cunentNumb

12、ef； operation.setText(Mn +stoiedNumber; operated = tine; lastOpeiatoi = opeiator; / 快捷使用 GndBagLayout 的方法 private void addComponent(GiidBagLayout layout. Component component, int row, mt col, mt width, mt height GndBagConstiaints constiamts=new GndBagConstiaints(; constiaints.fill = GndBagConstiaints.BOTH; constiamts.insets = new Iiisets(10, 2, 10, 2; constiauits.weightx = 100; constiaints.weighty = 100;constiauits.gndx = col; coiistiaints.gfidy = row; constiamts.giidwidth = width;constiauits.gndheight = height; layout.setConstiaints(component, constiaints;if (component instanceofJButton