📄 actor2dgroup.java
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package like.actor2D;
import like.graphics.*;
import java.awt.*;
public abstract class Actor2DGroup extends ImageGroup
{
//int和double的默认最小,最大值
protected static final int MAX_INT_UNBOUND = Integer.MAX_VALUE;
protected static final int MIN_INT_UNBOUND = Integer.MIN_VALUE;
protected static final double MAX_DOUBLE_UNBOUND = Double.MAX_VALUE;
protected static final double MIN_DOUBLE_UNBOUND = Double.MIN_VALUE;
//Actor2D可以具备的位置和速度的最大和最小值
//覆盖类可以在够造函数或init方法中改变这些值
public int MAX_X_POS = this.MAX_INT_UNBOUND;
public int MAX_Y_POS = this.MAX_INT_UNBOUND;
public int MIN_X_POS = this.MIN_INT_UNBOUND;
public int MIN_Y_POS = this.MIN_INT_UNBOUND;
//初始化共享的Actor2D的属性
public abstract void init(Frame frame);
}//Actor2DGroup
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