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public class Rectangle { }
float width, height;
public Rectangle(float width, float height) { }
public float getLength(){ }
public float getArea(){ }
public static void main(String [] args) {
Rectangle rect = new Rectangle(10, 20);
System.out.println(\Öܳ¤ÊÇ£º\return this.width * this.height; return (this.width + this.height) * 2; this.width = width; this.height = height;
System.out.println(\Ãæ»ýÊÇ£º\}
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