2016.3.16 (Java graphical user interface)

Boundary layout

public class Borderlayouttest extends jframe{

Public Borderlayouttest () {
This.setsize (900,600);
This.setdefaultcloseoperation (Jframe.exit_on_close);
This.settitle ("Border layout");
This.setlocationrelativeto (null);//Set the form to center

This.addcontent ();

This.setvisible (TRUE);
}


public void Addcontent () {
Container con = This.getcontentpane ();
Con.setlayout (New BorderLayout ());

JButton btn1 = new JButton ("OK 1");
JButton btn2 = new JButton ("OK 2");
JButton btn3 = new JButton ("OK 3");
JButton btn4 = new JButton ("OK 4");
JButton btn5 = new JButton ("OK 5");

Con.add (BTN1, borderlayout.east);
Con.add (BTN2, borderlayout.west);
Con.add (Btn3, Borderlayout.north);
Con.add (Btn4, Borderlayout.south);
Con.add (Btn5, Borderlayout.center);
}


public static void Main (string[] args) {
New Borderlayouttest ();
}
}

Flow layout

public class Flowlayouttest extends jframe{

Public Flowlayouttest () {
This.setsize (900,600);
This.setdefaultcloseoperation (Jframe.exit_on_close);
This.settitle ("Flow Layout");
This.setlocationrelativeto (null);//Set the form to center

This.addcontent ();

This.setvisible (TRUE);
}


public void Addcontent () {
Container con = This.getcontentpane ();

Con.setlayout (New FlowLayout ());

JLabel label = new JLabel ("Test");
JButton btn = new JButton ("determines size based on element content");
JButton btn2 = new JButton ("OK");
JButton btn3 = new JButton ("OK");
JButton btn4 = new JButton ("OK");
JButton btn5 = new JButton ("OK 5");

Con.add (label);
Con.add (BTN);
Con.add (BTN2);
Con.add (BTN3);
Con.add (BTN4);
Con.add (BTN5);
}


public static void Main (string[] args) {
New Flowlayouttest ();
}

}
Network layout

public class Gridlayouttest extends JFrame {

Public Gridlayouttest () {
This.setsize (900,600);
This.setdefaultcloseoperation (Jframe.exit_on_close);
This.settitle ("Grid layout");
This.setlocationrelativeto (null);//Set the form to center

This.addcontent ();

This.setvisible (TRUE);
}


public void Addcontent () {
Container con = This.getcontentpane ();
Con.setlayout (new GridLayout (2,3));

JButton btn1 = new JButton ("OK 1");
JButton btn2 = new JButton ("OK 2");
JButton btn3 = new JButton ("OK 3");
JButton btn4 = new JButton ("OK 4");
JButton btn5 = new JButton ("OK 5");
JButton btn6 = new JButton ("OK 6");
JButton btn7 = new JButton ("OK 7");
JButton btn8 = new JButton ("OK 8");
JButton btn9 = new JButton ("OK 9");

Con.add (BTN1);
Con.add (BTN2);
Con.add (BTN3);
Con.add (BTN4);
Con.add (BTN5);
Con.add (BTN6);
Con.add (BTN7);
Con.add (BTN8);
Con.add (BTN9);
}


public static void Main (string[] args) {
New Gridlayouttest ();
}

}

Event:
public class Actionlistenertest extends JFrame {

Public Actionlistenertest () {
This.setsize (900,600);
This.setdefaultcloseoperation (Jframe.exit_on_close);
This.settitle ("Border layout");
This.setlocationrelativeto (null);//Set the form to center

This.addcontent ();

This.setvisible (TRUE);
}


private void Addcontent () {
Container con = This.getcontentpane ();
Con.setlayout (New FlowLayout ());

JButton btn1 = new JButton ("Red");
JButton btn2 = new JButton ("green");

Buttonlistener Btlis = new Buttonlistener (this);
Btn1.addactionlistener (Btlis);
Btn2.addactionlistener (Btlis);


Btn1.addactionlistener (new ActionListener () {
@Override
public void actionperformed (ActionEvent e) {
Getcontentpane (). SetBackground (color.red);
}});

Btn2.addactionlistener (new ActionListener () {
@Override
public void actionperformed (ActionEvent e) {
Getcontentpane (). SetBackground (Color.green);
}});

Con.add (BTN1);
Con.add (BTN2);
}

@Override
public void actionperformed (ActionEvent e) {
System.out.println ("enter");
Object obj = E.getsource ();
JButton btn = (JButton) obj;
String text = Btn.gettext ();
//
if (Text.equals ("Red")) {
This.getcontentpane (). SetBackground (color.red);
//}
//
if (Text.equals ("green")) {
This.getcontentpane (). SetBackground (Color.green);
//}
//}


public static void Main (string[] args) {
New Actionlistenertest ();

}

}

Another way to add an event implementation ActionListener

public class Buttonlistener implements ActionListener {

Private JFrame JF;

Public Buttonlistener () {

}

Public Buttonlistener (JFrame JF) {
THIS.JF = JF;
}

@Override
public void actionperformed (ActionEvent e) {
System.out.println ("Enter 123");
Object obj = E.getsource ();
JButton btn = (JButton) obj;
String text = Btn.gettext ();

if (Text.equals ("Red")) {
This.jf.getContentPane (). SetBackground (color.red);
}

if (Text.equals ("green")) {
This.jf.getContentPane (). SetBackground (Color.green);
}
}

}

2016.3.16 (Java graphical user interface)