?? thing.java
字號:
package skyrocket;
import java.awt.Color;
import java.awt.Graphics2D;
abstract class Thing implements Comparable {
Canvas canvas;
int birthTime;
Color color;
int width, height;
double stateX, stateY, velocity;
boolean stateDead;
Thing( Canvas canvas ) {
this.canvas = canvas;
birthTime = canvas.currentTime;
}
void paint() {
Graphics2D g = (Graphics2D) canvas.offscreenGraphics;
int time = canvas.currentTime - birthTime;
g.setColor( color );
draw( g, time );
}
abstract void draw( Graphics2D g, int time );
public int compareTo( Object o ) {
Thing thing = (Thing) o;
if( birthTime > thing.birthTime )
return -1;
if( birthTime < thing.birthTime )
return 1;
if( equals( thing ) )
return 0;
return -1;
}
}
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