计算器设计的java课程设计报告(3)

华东交通大学课程设计

bSqrt.addActionListener(this); bMulti.addActionListener(this); bMinus.addActionListener(this); bPercent.addActionListener(this); bPlus.addActionListener(this);

bReciprocal.addActionListener(this); bEqual.addActionListener(this); bDot.addActionListener(this);

bNegative.addActionListener(this);

p2.add(b7); //将按钮依次添加到面板 p2.add(b8); p2.add(b9); p2.add(bDiv); p2.add(bSqrt); p2.add(b4); p2.add(b5); p2.add(b6); p2.add(bMulti); p2.add(bPercent); p2.add(b1); p2.add(b2); p2.add(b3);

p2.add(bMinus); p2.add(bReciprocal); p2.add(b0);

p2.add(bNegative); p2.add(bDot); p2.add(bPlus); p2.add(bEqual);

bBackspace=new Button(\ bCE=new Button(\ bC=new Button(\

bBackspace.addActionListener(this); bCE.addActionListener(this); bC.addActionListener(this);

p1.add(bBackspace); p1.add(bCE); p1.add(bC);

tf2=new TextField(2);

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华东交通大学课程设计

tf2.setEnabled(false);

tf2.setBackground(Color.LIGHT_GRAY); bMC=new Button(\ bMR=new Button(\ bMS=new Button(\ bM=new Button(\

bMC.addActionListener(this); bMR.addActionListener(this); bMS.addActionListener(this); bM.addActionListener(this);

p6.add(tf2); p3.add(p6); p3.add(bMC); p3.add(bMR); p3.add(bMS); p3.add(bM);

f.setVisible(true);

f.addWindowListener(this); }

public void actionPerformed(ActionEvent e) {

//key 0 to 9

if(this.keyAvailable&&e.getActionCommand().length()==1&&e.getActionCommand().compareTo(\

{

if(this.isTempNowInput) {

this.dNowInput=0;

this.isTempNowInput=false; }

this.nBitsNum++;

if(this.alreadyHaveDot==false)

this.dNowInput=this.dNowInput*10+Double.parseDouble(e.getActionCommand()); else {

double temp=Double.parseDouble(e.getActionCommand()); for(int i=this.n;i<0;i++) {

temp*=0.1;

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华东交通大学课程设计

}

this.dNowInput+=temp; this.n--; }

this.tf1.setText(Double.toString(this.dNowInput)); }

// key dot

if(this.keyAvailable && e.getActionCommand()==\ {

if(this.alreadyHaveDot==false) {

this.nBitsNum++;

this.alreadyHaveDot=true; this.n=-1; } }

//key \

if(this.keyAvailable && e.getActionCommand()==\|| e.getActionCommand()==\|| e.getActionCommand()==\

{

if(this.alreadyClickedEqueal) {

this.dNowInput=this.dResult; this.isTempNowInput=true; } else {

switch(this.nOperation) {

case 1: this.dResult+=this.dNowInput; break; case 2: this.dResult-=this.dNowInput; break; case 3: this.dResult*=this.dNowInput; break; case 4: {

if(this.dNowInput==0) {

tf1.setText(\除数不能为零\ this.keyAvailable=false; }

else this.dResult=this.dResult/this.dNowInput; } }

if(this.keyAvailable)tf1.setText(Double.toString(this.dResult)); this.dNowInput=0;

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华东交通大学课程设计

}

if(e.getActionCommand()==\ {

this.nOperation=1; }

if(e.getActionCommand()==\ {

this.nOperation=2; }

if(e.getActionCommand()==\ {

this.nOperation=3; }

if(e.getActionCommand()==\ {

this.nOperation=4; }

this.nBitsNum=0;

this.alreadyClickedEqueal=false; }

// key \

if(this.keyAvailable && e.getActionCommand()==\ {

this.dNowInput=0-this.dNowInput;

tf1.setText(Double.toString(this.dNowInput)); }

// key \

if(e.getActionCommand()==\ {

this.nBitsNum=0; this.dResult=0; this.dNowInput=0;

this.alreadyHaveDot=false; this.n=0;

this.nOperation=1; this.keyAvailable=true;

this.alreadyClickedEqueal=false; tf1.setText(\ }

// key \

if(e.getActionCommand()==\ {

this.nBitsNum=0; this.dNowInput=0;

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华东交通大学课程设计

this.alreadyHaveDot=false; this.n=0;

this.nOperation=1; this.keyAvailable=true; tf1.setText(\ }

// key \

if(this.keyAvailable && e.getActionCommand()==\ {

if(this.alreadyClickedEqueal) {

if(this.dResult>=0) {

this.dResult=Math.sqrt(this.dResult);

tf1.setText(Double.toString(this.dResult)); } else {

tf1.setText(\函数输入无效\ this.keyAvailable=false; } } else {

if(this.dNowInput>=0) {

this.dNowInput=Math.sqrt(this.dNowInput); tf1.setText(Double.toString(this.dNowInput)); } else {

tf1.setText(\函数输入无效\ this.keyAvailable=false; } } }

// key \

if(this.keyAvailable && e.getActionCommand()==\ {

if(this.dNowInput==0) {

tf1.setText(\除数不能为零\ this.keyAvailable=false; }

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