简单加减乘除计算器

PAGE/NUMPAGESimportjava.awt.FlowLayout;importjava.awt.GridLayout;importjava.awt.event.ActionEvent;importjava.awt.event.ActionListener;importjavax.swing.JButton;importjavax.swing.JComboBox;importjavax.swing.JFrame;importjavax.swing.JLabel;importjavax.swing.JOptionPane;importjavax.swing.JPanel;importjavax.swing.JTextField;importjava.util.*;publicclassSuperCalculatorextendsJFrameimplementsActionListener{privateJLabelheading;privateJPanelheaderPanel;privateJTextFieldnumber1=null;privateJComboBoxop=null;privateJTextFieldnumber2=null;privateJButtoneq=null;privateJButtonclear=null;privateJButtona1=null;privateJButtona2=null;privateJButtona3=null;privateJButtona4=null;privateJTextFieldresult=null;publicSuperCalculator(){this.setLayout(newFlowLayout(FlowLayout.CENTER));this.add(heading=newJLabel(""));this.add(heading=newJLabel("SUPERCALCULATOR"));this.add(heading=newJLabel(""));this.add(heading=newJLabel(""));this.add(heading=newJLabel(""));//this.setLayout(null)；//this.add(heading=newJLabel(""));this.add(heading=newJLabel("Numner1"));number1=newJTextField(5);op=newJComboBox(newString[]{"+","-","×","÷"});number2=newJTextField(5);eq=newJButton("Exit");eq.addActionListener(this);a1=newJButton("Add");a1.addActionListener(this);a2=newJButton("Subtract");a2.addActionListener(this);a3=newJButton("Multiple");a3.addActionListener(this);a4=newJButton("Divide");a4.addActionListener(this);clear=newJButton("Clear");clear.addActionListener(this);result=newJTextField(5);this.add(number1);this.add(heading=newJLabel("Numner2"));this.add(number2);this.add(heading=newJLabel("Result"));this.add(result);//this.result.disable();this.add(heading=newJLabel(""));this.add(heading=newJLabel(""));this.add(a1);this.add(a2);this.add(a3);this.add(a4);this.add(heading=newJLabel(""));this.add(clear);this.add(eq);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setSize(480,280);this.setLocationRelativeTo(null);this.setTitle("SuperCalculator");this.setResizable(false);this.setVisible(true);}publicstaticvoidmain(String[]args){newSuperCalculator();}@OverridepublicvoidactionPerformed(ActionEventarg0){if(arg0.getSource()==eq){System.exit(0);}if(arg0.getSource()==a1){doublen1=0.0;doublen2=0.0;try{n1=Double.parseDouble(number1.getText());}catch(NumberFormatExceptionnfe){JOptionPane.showMessageDialog(null,"number1isnotcorrectform");}try{n2=Double.parseDouble(number2.getText());}catch(NumberFormatExceptionnfe){JOptionPane.showMessageDialog(null,"number2isnotcorrectform");}result.setText(String.valueOf(n1+n2));}if(arg0.getSource()==a2){doublen1=0.0;doublen2=0.0;try{n1=Double.parseDouble(number1.getText());}catch(NumberFormatExceptionnfe){JOptionPane.showMessageDialog(null,"number1isnotcorrectform");}try{n2=Double.parseDouble(number2.getText());}catch(NumberFormatExceptionnfe){JOptionPane.showMessageDialog(null,"number2isnotcorrectform");}result.setText(String.valueOf(n1-n2));}if(arg0.getSource()==a3){doublen1=0.0;doublen2=0.0;try{n1=Double.parseDouble(number1.getText());}catch(NumberFormatExceptionnfe){JOptionPane.showMessageDialog(null,"number1isnotcorrectform");}try{n2=Double.parseDouble(number2.getText());}catch(NumberFormatExceptionnfe){JOptionPane.showMessageDialog(null,"number2isnotcorrectform");}result.setText(String.valueOf(n1*n2));}if(arg0.getSource()==a4){doublen1=0.0;doublen2=0.0;try{n1=Double.parseDouble(number1.getText());}catch(NumberFormatExceptionnfe){JOptionPane.showMessageDialog(null,"number1isnotcorrectform");}try{n2=Double.parseDouble(number2.getText());}catch(NumberFormatExceptionnfe){JOptionPane.showMessageDialog(null,"number2isnotcorrectform");}if(n2!=0)result.setText(String.valueOf(n1/n2));else{JOptionPane.showMessageDialog(null,"youcannotdivideanumberwith0");number2.setText("");}}if(arg0.getSource()==clear){doublen1=0.0;doublen2=0.0;result.setText(String.valueOf(n1));number1.setText(String.valueOf(n1));number2.setText(String.valueOf(n1));}}}Output友情提示： 方案 气瓶 现场处置方案 .pdf气瓶 现场处置方案 .doc见习基地管理方案.doc关于群访事件的化解方案建筑工地扬尘治理专项方案下载 范本是经验性极强的领域，本范文无法思考和涵盖全面，供参考!最好找专业人士起草或审核后使用。