矿大java实验三

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1、Java实验三计11-1班梁绕绕081133711.使用编写代码的方式，设计一个用户界面如下图所示：packageshiyan;importjava.awt.*;importjavax.swing.*;importjava.awt.event.ActionListener;importjava.awt.event.ActionEvent;publicclassComputer{publicstaticvoidmain(String[]args){JFramef=newJFrame("计算器");f.setLayout(newFlowLayout());finalJTextF

2、ieldtextfield1=newJTextField(15);finalJTextFieldtextfield2=newJTextField(15);finalJTextFieldtextfield3=newJTextField(15);JButtonbutton1=newJButton("+");JButtonbutton2=newJButton("-");JButtonbutton3=newJButton("*");JButtonbutton4=newJButton("/");f.add(textfield1);f.add(textfield2);f.add(but

3、ton1);f.add(button2);f.add(button3);f.add(button4);button1.setForeground(Color.RED);button2.setForeground(Color.GREEN);button3.setForeground(Color.pink);button4.setForeground(Color.BLUE);f.add(textfield3);f.setVisible(true);f.setBounds(100,100,200,160);f.setResizable(false);f.setDefaultClo

4、seOperation(f.EXIT_ON_CLOSE);button1.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEventevent){Strings1=textfield1.getText();Strings2=textfield2.getText();doublem1=Double.parseDouble(s1);doublem2=Double.parseDouble(s2);doublem3=m1+m2;Strings3=String.valueOf(m3);//te

5、xtfield3。setText(s3);textfield3.setText(s3);}});button2.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEventevent){Strings1=textfield1.getText();Strings2=textfield2.getText();doublem1=Double.parseDouble(s1);doublem2=Double.parseDouble(s2);doublem3=m1-m2;Strings3=Stri

6、ng.valueOf(m3);//textfield3。setText(s3);textfield3.setText(s3);}});button3.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEventevent){Strings1=textfield1.getText();Strings2=textfield2.getText();doublem1=Double.parseDouble(s1);doublem2=Double.parseDouble(s2);doublem3=

7、m1*m2;Strings3=String.valueOf(m3);//textfield3。setText(s3);textfield3.setText(s3);}});button4.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEventevent){Strings1=textfield1.getText();Strings2=textfield2.getText();doublem1=Double.parseDou