EVENT HANDLING (1)

TUGAS PRAKTIKUM

PEMROGRAMAN JAVA II

EVENT HANDLING

Oleh :

D. Wahyu Baswara Seta.

123080043

Asisten / Coas :

Shiddieqy Y.Katili / Dimas A.

JURUSAN TEKNIK INFORMATIKA

FAKULTAS TEKNOLOGI INDUSTRI

UNIVERSITAS PEMBANGUNAN NASIONAL “VETERAN” YOGYAKARTA

2010

TUGAS

1. Login

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.FocusEvent;

import java.awt.event.FocusListener;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPasswordField;

import javax.swing.JTextField;

class login extends JFrame{

public JLabel luser,lpass;

public JTextField tuser;

public JPasswordField tpass;

public JButton bok,bcancel;

public login(){ // construktor

luser = new JLabel("user") ;

lpass = new JLabel("Password");

tuser = new JTextField(10);

tpass = new JPasswordField(10);

bok = new JButton("OK");

bcancel = new JButton ("CANCEL");

setLayout(new GridLayout(3,2));

add(luser);

add(tuser);

add(lpass);

add(tpass);

add(bok);

add(bcancel);

tuser.addKeyListener(new KeyListener() {

public void keyTyped(KeyEvent ke) {

}

public void keyPressed(KeyEvent ke) {

if(ke.getKeyChar()==KeyEvent.VK_ENTER){

tpass.requestFocus();

}

}

public void keyReleased(KeyEvent ke) {

}

});

tuser.addFocusListener(new FocusListener() {

public void focusGained(FocusEvent fe) {

//mengaktifkan/noaktifkan objek

}

public void focusLost(FocusEvent fe) {

tuser.setEnabled(false);

}

});

bok.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent ae) {

String user =" ";

String pass ="";

user = tuser.getText();

pass = tpass.getText();

if(user.equalsIgnoreCase("123")&&pass.equalsIgnoreCase("java2")){

JOptionPane.showMessageDialog(null,"Login Sukses","Pesan",JOptionPane.OK_OPTION);

new MenuUtama();

dispose();

}else{

JOptionPane.showMessageDialog(null,"Login Gagal,user" +tuser.getText()+"Tidak terdaftar", "Pesan",JOptionPane.ERROR_MESSAGE);

tuser.setEnabled(true);

tuser.requestFocus();

tpass.setEnabled(true);

tuser.setText(" ");

tpass.setText("");

}

}

});

setDefaultCloseOperation(3);

setSize(300,150);

setVisible(true);

setTitle("Login");

}

}

public class plogin{

public static void main(String[] args) {

new login();

}

}

Output :

Penjelasan :

import java.awt.GridLayout; // untuk fungsi layout

import java.awt.event.ActionEvent;//untuk fungsi event

import java.awt.event.ActionListener;//fungsi event

import java.awt.event.FocusEvent;// untuk fungsi event

import java.awt.event.FocusListener; // untuk fungsi event

import java.awt.event.KeyEvent; // untuk fungsi event

import java.awt.event.KeyListener; // untuk fungsi event

import javax.swing.JButton; //untuk fungsi Button

import javax.swing.JFrame; //untuk fungsi frame

import javax.swing.JLabel;//untuk fungsi label

import javax.swing.JOptionPane; // untuk fungsi option

import javax.swing.JPasswordField; // untuk fungsi password

import javax.swing.JTextField; // untuk fungsi text

class login extends JFrame{ // kelas

public JLabel luser,lpass;//deklarasi JLabel

public JTextField tuser;//deklarasi JTextField

public JPasswordField tpass;//deklarasi JPassword

public JButton bok,bcancel;//deklarasi JButton

public login(){ // construktor

luser = new JLabel("user"); // instansiasi label user

lpass = new JLabel("Password");// instansiasi label password

tuser = new JTextField(10); // instansiasi textfield user

tpass = new JPasswordField(10); // instansiasi textfield password

bok = new JButton("OK");// instansiasi button ok

bcancel = new JButton ("CANCEL");// instansiasi button cancel

setLayout(new GridLayout(3,2));// mengatur gridlayout

add(luser);//menambahkan label user pada layout

add(tuser);//menambahkan textfield user

add(lpass);//menambahkan label pass

add(tpass);// menambahkan textfield pass

add(bok); // menambahkan button ok

add(bcancel); // menambahkan button cancel

tuser.addKeyListener(new KeyListener() {

public void keyTyped(KeyEvent ke) { //method

}

public void keyPressed(KeyEvent ke) {//method

if(ke.getKeyChar()==KeyEvent.VK_ENTER)

tpass.requestFocus();

}

}

public void keyReleased(KeyEvent ke) {

}

});

tuser.addFocusListener(new FocusListener() {

public void focusGained(FocusEvent fe) {

//mengaktifkan/noaktifkan objek

}

public void focusLost(FocusEvent fe) {

tuser.setEnabled(false);

}

});

bok.addActionListener(new ActionListener() {//menambahkb actionlistener pada button ok

public void actionPerformed(ActionEvent ae) {

String user =" ";

String pass ="";

user = tuser.getText();//mengambil nilai char pada user

pass = tpass.getText();//mengambil nilai char pada password

if(user.equalsIgnoreCase("123")&&pass.equalsIgnoreCase("java2")){ //username berisi 123 dan paswaord berisi java2

JOptionPane.showMessageDialog(null,"Login Sukses","Pesan",JOptionPane.OK_OPTION);//

new MenuUtama();//membuka menu utama

dispose();//befungsi untuk balik ke semula

}else{

JOptionPane.showMessageDialog(null,"Login Gagal,user" +tuser.getText()+"Tidak terdaftar", "Pesan",JOptionPane.ERROR_MESSAGE);//login gagal maka keluar pesan login gagal (user yang dimasukkan ) tidak terdaftar

tuser.setEnabled(true);

tuser.requestFocus();

tpass.setEnabled(true);

tuser.setText(" ");

tpass.setText("");

}

}

});

setDefaultCloseOperation(3);

setSize(300,150);//mengatur ukuran output

setVisible(true);//

setTitle("Login");

}

}

public class plogin{//kelas

public static void main(String[] args) {//method main

new login();//objek yg memanggil kelas

}

}


2. Mouse

import java.awt.event.MouseEvent;

import java.awt.event.MouseMotionListener;

import javax.swing.JFrame;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

class Main extends JFrame implements MouseMotionListener{


JScrollPane sb;

JTextArea jt;

String text="";


public Main() {

setTitle("Mouse Motion Listener");


jt=new JTextArea();

sb=new JScrollPane();

sb.setViewportView(jt);


jt.setFont(new java.awt.Font("DejaVu Sans", 3, 16));


setLayout(null);

//sb.add(jt);

add(sb);


sb.setBounds(300,75, 260, 270);


setSize(600, 400);

setVisible(true);

setDefaultCloseOperation(3);

addMouseMotionListener(this);

}

public void mouseDragged(MouseEvent me) {

throw new UnsupportedOperationException("Not supported yet.");

}


public void mouseMoved(MouseEvent me) {

try{

text=text+ "\nPosisi Mouse x: "+getMousePosition().x+", y: "+getMousePosition().y;

jt.setText(text);}catch(Exception e){


}

}


public static void main(String[] args) {

new Main();

}

}

output -->