java开发实战经典（第二版）P217 6-2

6.2   考虑一个表示图形的类，写出类中的属性及方法。

package book;

class Graph {
	private float length;
	private float width;
	private String backcolor;

	public float getLength() {
		return length;
	}

	public void setLength(float length) {
		this.length = length;
	}

	public float getWidth() {
		return width;
	}

	public void setWidth(float width) {
		this.width = width;
	}

	public String getBackcolor() {
		return backcolor;
	}

	public void setBackcolor(String backcolor) {
		this.backcolor = backcolor;
	}

	public void size() {
		System.out.println("设置图片的尺寸");
	}

	public void color() {
		System.out.println("设置图片的背景颜色");
	}
}

public class JiOu {
	public static void main(String[] args) {
		Graph graph = new Graph();
		graph.size();
		graph.color();
	}
}

运行结果:

设置图片的尺寸
设置图片的背景颜色