Java GUI (1)-AWT component and layout management

I. Understand vocabulary

1. Common Words

2. java. AWT package

The Java. AWT package is a Java built-in package, which is part of the Java basic class library (jfc [Java foundation classes]) and contains the following content:

1. a rich set of interface components that are easy for users to enter;

2. Place components in several layout managers in the appropriate positions

3. Event Processing Model

4. Graphics and image tools

Use an explicit declaration statement: Import java. AWT .*;

3. My first GUI program:

 

Import java. AWT .*;

Public class awtdemo {

Public static void main (string ARGs []) {

New myframe ("My first GUI program", 100,100,100,100, color. Red );

}

}

Class myframe extends frame {

Myframe (string S, int X, int y, int W, int H, color ){

Super (s );

Setbackground (color );

Setlayout (null );

Setbounds (X, Y, W, H );

Setvisible (true );

}

}

Ii. architecture of the Space class in the Java. AWT package

 

Differences between window and panel: a panel cannot exist independently and must be placed in a window or another subclass.

2. Common AWT components