1. Write a Java application to display the following GUI. At this point you are

Question

1. Write a Java application to display the following GUI. At this point you are only implementing the display.

This program has the following requirements:

1. The textfield should accommodate 3 characters.

2. The V1 and V2 labels should be next to the corresponding textfields.

Hint: Put each label and its adjacent text field into a panel, then put both panels into another panel!

3. The buttons should have 10 pixels horizontal spacing and 5 pixels vertical spacing.

4. For the layout of the JFrame, use FlowLayout( FlowLayout.CENTER, 10, 5).

5. Your application should be implemented in a single class. The main method of the class does nothing more than create an object of the class. The constructor of the class creates and displays the GUI. The constructor may call other methods of the class if needed.

6. Do not use inheritance for this program. Use a JFrame member variable as the main window object for this program.

Take screen shots of the output of programs 1 & 2. Paste the screen shots and your source code for your programs into a Word document.

Explanation / Answer

import java.io.*; import java.awt.*; import java.awt.event.*; import java.applet.*; class Frame1 extends Frame implements ActionListener { String msg=""; Button btnNew,btnSubmit,btnView; Label lblName,lblAge,lblAddr,lblGender,lblQua; TextField txtName,txtAge; TextArea txtAddr,txtAns; CheckboxGroup ChkGrp; Checkbox chkMale,chkFemale; Checkbox chkMca,chkBca,chkBba,chkMba; Frame1(String name) { super(name); setLayout(new GridLayout(3,2)); lblName = new Label("Name: "); lblAge = new Label("Age: "); lblAddr = new Label("Address : "); lblGender = new Label("Gender: "); lblQua = new Label("Qualification: "); txtName = new TextField(20); txtAge = new TextField(20); txtAddr = new TextArea(); ChkGrp = new CheckboxGroup(); chkMale = new Checkbox("Male",ChkGrp,false); chkFemale = new Checkbox("Female",ChkGrp,false); chkMca = new Checkbox("MCA"); chkBca = new Checkbox("BCA"); chkMba = new Checkbox("MBA"); chkBba = new Checkbox("BBA"); btnNew = new Button("NEW"); btnSubmit = new Button("SUBMIT"); btnView = new Button("VIEW"); btnNew.addActionListener(this); btnSubmit.addActionListener(this); btnView.addActionListener(this); add(lblName); add(txtName); add(lblAge); add(txtAge); add(lblAddr); add(txtAddr); add(lblGender); add(chkMale); add(chkFemale); add(lblQua); add(chkBca); add(chkBba); add(chkMca); add(chkMba); add(btnNew); add(btnSubmit); add(btnView); txtAns = new TextArea(); add(txtAns); } publicvoid actionPerformed(ActionEvent ae) { String s=""; boolean b; FileInputStream Fin; DataInputStream dis; FileOutputStream Fout; DataOutputStream dos; try { Fout = new FileOutputStream("Biodata.txt",true); dos = new DataOutputStream(Fout); String str = ae.getActionCommand(); if(str.equals("SUBMIT")) { s=txtName.getText().trim(); dos.writeUTF(s); dos.writeInt(Integer.parseInt(txtAge.getText())); s=txtAddr.getText(); dos.writeUTF(s); if(chkMale.getState()) dos.writeUTF("Male "); if(chkFemale.getState()) dos.writeUTF("Female "); s=""; if(chkMca.getState()) s="MCA "; if(chkBca.getState()) s+="BCA "; if(chkBba.getState()) s+="BBA "; if(chkMba.getState()) s+="MBA "; s+="!"; dos.writeUTF(s); Fout.close(); } if(str.equals("VIEW")) { String tmp,name,addr,gender,qual; int age; Fin = new FileInputStream("Biodata.txt"); dis = new DataInputStream(Fin); int i=0,j; while(Fin.available()>0) { name = dis.readUTF(); age = dis.readInt(); addr = dis.readUTF(); gender = dis.readUTF(); qual = dis.readUTF(); if(name.equals(txtName.getText().trim())) { txtAge.setText(age+""); txtAddr.setText(addr); if(gender.equals("Male ")) chkMale.setState(true); else chkFemale.setState(true); while(qual.charAt(i)!='!') { j=qual.indexOf(' '); tmp = qual.substring(i,j); if(tmp.equals("MCA")) chkMca.setState(true); if(tmp.equals("BCA")) chkBca.setState(true); if(tmp.equals("BBA")) chkBba.setState(true); if(tmp.equals("MBA")) chkMba.setState(true); i=j+1; } break; } } Fin.close(); } if(str.equals("NEW")) { txtName.setText(""); txtAge.setText(""); txtAddr.setText(""); chkMale.setState(false); chkFemale.setState(false); chkMca.setState(false); chkBca.setState(false); chkBba.setState(false); chkMba.setState(false); } } catch(Exception e) { System.out.println("The Exception Is : " +e); } } } class Bio2 { publicstaticvoid main(String args[]) { try{ Frame1 F = new Frame1("Biodata"); F.setSize(400,400); F.show(); }catch(Exception e) { System.out.println(e); } } }

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