Java Learning--awt Layout components

Learn some of the Windows components in the AWT development form program in Java and take notes

FlowLayout:

Import java.awt.*;p ublic class Wintwo2 extends frame{//define a text box. TextArea a=new TextArea ("Please fill in the information accurately");//define three button components. Button B1=new button ("submit"); Button B2=new button ("Cancel"); Button B3=new button ("reset"); WINTWO2 () {//sets the window name. This.settitle ("Survey Information Card");//Set layout manager to FlowLayout. This.setlayout (New FlowLayout ());//Place the button component in the window This.add (a); This.add (B1); This.add (B2); This.add (b3);// Set the window's position and size this.setbounds (100, 100, 450, 350);//Set Window visibility this.setvisible (true);} public static void Main (string[] args) {//TODO auto-generated method Stubnew Wintwo2 ();}}

BorderLayout:

Import Java.awt.*;import Java.awt.peer.textareapeer;public class Winthree1 extends frame{//define five button components textarea b1=new TextArea ("Medium"); TextArea b2=new TextArea ("South"); Button B3=new button ("submit"); Button B4=new button ("Cancel"); Button B5=new button ("reset"); Winthree1 () {//Set window name This.settitle ("sharp tool borderlayout");//Set Layout manager borderlayoutthis.setlayout (new BorderLayout ());// Place the button component into the window's specified position This.add (B1, Borderlayout.center); This.add (B2, Borderlayout.north); This.add (B3, Borderlayout.south); This.add (B4, borderlayout.west); This.add (B5, borderlayout.east);//Set window position and size this.setbounds (300, 200, 450, 350);// Set window Visibility this.setvisible (true);} public static void Main (string[] args) {//TODO auto-generated method Stubnew Winthree1 ();}}

GridLayout:

Import java.awt.*; public class Winfour2 extends Frame{textarea b1=new TextArea ("a"); TextArea b2=new TextArea ("B"); Button B3=new button ("C"); Button B4=new button ("ding"); Button B5=new button ("E"); Winfour2 () {this.settitle ("girdlayout layout") this.setlayout (New GridLayout (2, 3)); This.add (B1); This.add (B2); this.add (b3); This.add (B4); This.add (B5); This.setbounds (+, +, +); This.setvisible (true);} public static void Main (string[] args) {//TODO auto-generated method Stubnew Winfour2 ();}}

CardLayout:

Import Java.awt.*;import java.awt.event.*;p ublic class Winfive1 extends Frame implements actionlistener{//define a faceplate panel p =new Panel ();//define five Buttons button Bf=new button ("First"); Button Bl=new button ("last"); Button Bn=new button ("Next"); Button Bp=new button ("previous"); Button Bg=new button ("search");//define a single-line text box TextField tf=new TextField ();//Set Layout manager cardlayout cl=new cardlayout (); Winfive1 () {//Set window name This.settitle ("Use cardlayout layout component"), This.setbackground (Color.Blue); this.setresizable (false); This.setlayout (null); This.add (P);//define p panel for CardLayout layout manager p.setlayout (CL);//Add component for CardLayout layout manager for (int i=1; i< = 3; i++) {button Btemp=new button ("Layout button" +i);p. Add (Btemp, "" +i);} Set the size position for each component and add it to the container p.setbounds (ten, 40, 120); This.add (BF); Bf.addactionlistener (this); This.add (BL); Bl.addactionlistener (this), bl.setbounds (+,-), This.add (BN); Bn.addactionlistener (This) ; Bn.setbounds (+), This.add (BP), Bp.addactionlistener (This), Bp.setbounds ((), This.add (BG); Bg.addactIonlistener (This), Bg.setbounds (20, 160, 40, 20), This.add (TF); Sets the position and size of the window this.setbounds (200, 200, 400, 380);//sets the visibility of the window this.setvisible (true);} Implement the Actionperformed method in the ActionListener interface public void actionperformed (Java.awt.event.ActionEvent e) {//next method if ( E.getsource () ==bn) {Cl.next (P);} Previous method if (E.getsource () ==bp) {cl.previous (P);} First method if (E.getsource () ==bf) {Cl.first (P);} Last method if (E.getsource () ==bl) {cl.last (P);} The Show method if (E.getsource () ==bg) {cl.show (P, Tf.gettext (). Trim ()); Tf.settext ("");}} public static void Main (string[] args) {//TODO auto-generated method Stubnew Winfive1 ();}}

Null:

Import Java.awt.*;import java.awt.event.*;p ublic class Winnull2 extends frame{//define three buttons button B1=new button ("a"); Button B2=new button ("B"); Button B3=new button ("C");p ublic Winnull2 () {//Set window name This.settitle ("null layout");//Set NULL layout manager this.setlayout (NULL);// Add components to the container This.add (B1); This.add (B2); This.add (b3);//Set the size and position of the component B1.setbounds (50, 120, 100, B3.setbounds (50, 190, 100, 50);//Set window position and size this.setbounds (100, 100, 450, 400);//Set Window visibility this.setvisible (true);} public static void Main (string[] args) {//TODO auto-generated method Stubnew Winnull2 ();}}

Java Learning--awt Layout components