JAVA-calculator.rar_calculator_java calculator

#动力节点#假如失败和成功是杠杆的两端，到http://dwz.cn/3d5vhB这里来寻找你的砝码。 import java.awt.*; import java.awt.event.*; import java.awt.Frame.*; @SuppressWarnings("unused") public class jisuanqi extends WindowAdapter implements ActionListener { double dResult=0; double dNowInput=0; double dMemory; int n=0; int nOperation=1; int nBitsNum=0; boolean alreadyHaveDot=false; boolean keyAvailable=true; boolean alreadyClickedEqueal=false; boolean isTempNowInput=false; Frame f; Panel p1,p2,p3,p4,p5,p6; TextField tf1,tf2; Button b1,b2,b3,b4,b5,b6,b7,b8,b9,b0; Button bDiv,bSqrt,bMulti,bMinus,bPercent,bPlus,bReciprocal,bEqual,bDot,bNegative; Button bBackspace,bCE,bC; public void display() { f=new Frame("实训计算器"); f.setSize(300,280); f.setLocation(200,200); f.setBackground(Color.RED); f.setResizable(false); f.setLayout(new BorderLayout(3,3)); p1=new Panel(new GridLayout(1,3,5,5)); p2=new Panel(new GridLayout(4,5,5,5)); p3=new Panel(new GridLayout(5,1,5,5)); p4=new Panel(new FlowLayout()); p5=new Panel(new FlowLayout()); p6=new Panel(new FlowLayout()); p4.add(p1); p4.add(p2); tf1=new TextField(35); //存放显示区 tf1.setText("0"); tf1.setEditable(false); p5.add(tf1); f.add(p5,BorderLayout.NORTH); f.add(p4,BorderLayout.CENTER); f.add(p3,BorderLayout.WEST); b1=new Button("1"); b2=new Button("2"); b3=new Button("3"); b4=new Button("4"); b5=new Button("5"); b6=new Button("6"); b7=new Button("7"); b8=new Button("8"); b9=new Button("9"); b0=new Button("0"); b1.addActionListener(this); b2.addActionListener(this); b3.addActionListener(this); b4.addActionListener(this); b5.addActionListener(this); b6.addActionListener(this); b7.addActionListener(this); b8.addActionListener(this); b9.addActionListener(this); b0.addActionListener(this); bDiv=new Button("/"); bMulti=new Button("*"); bMinus=new Button("-"); bPlus=new Button("+"); bEqual=new Button("="); bDot=new Button("."); bNegative=new Button("+/-"); bSqrt=new Button("sqrt"); bPercent=new Button("%"); bReciprocal=new Button("1/x"); Button bMR,bMS,bMC,bM;//隐藏它 bDiv.addActionListener(this); 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); 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("Backspace"); bCE=new Button("CE"); bC=new Button("C"); bBackspace.addActionListener(this); bCE.addActionListener(this); bC.addActionListener(this); p1.add(bBackspace); p1.add(bCE); p1.add(bC); tf2=new TextField(2); tf2.setEnabled(false); tf2.setBackground(Color.RED); bMC=new Button("MC"); bMR=new Button("MR"); bMS=new Button("MS"); bM=new Button("M+"); 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("0")>=0 && e.getActionCommand().compareTo("9")<=0) { 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; } 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()=="*" || 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; } 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 "C" if(e.getActionCommand()=="C") { 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("0."); } // key "CE" if(e.getActionCommand()=="CE") { this.nBitsNum=0; this.dNowInput=0; this.alreadyHaveDot=false; this.n=0; this.nOperation=1; this.keyAvailable=true; tf1.setText("0."); } // key "sqrt" if(this.keyAvailable && e.getActionCommand()=="sqrt") { 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 "1/x" if(this.keyAvailable && e.getActionCommand()=="1/x") { if(this.dNowInput==0) { tf1.setText("除数不能为零"); this.keyAvailable=false; } else { this.dNowInput=1/this.dNowInput; tf1.setText(Double.toString(this.dNowInput)); } } // key "=" if(this.keyAvailable && e.getActionCommand()=="=") { this.alreadyClickedEqueal=true; 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)); } // key "MS" if(this.keyAvailable && e.getActionCommand()=="MS") { this.