testcirle.java

来自「tutorial for java programming」· Java 代码 · 共 29 行

//Exercise 7.1
public class TestCirle {
	public static void main(String[] args){
		//instances
		Circle c1 = new Circle();//instance with default radius and color
		System.out.println("The circle has radius of "
				+ c1.getRadius() + " and area of " + c1.getArea());
		
		Circle c2 = new Circle(2.0); //instance with specified radius and default color
		System.out.println("The circle has radius of "
				+ c2.getRadius() + " and area of " + c2.getArea());
		
		Circle c3 = new Circle();
		c3.setRadius(5.0);
		c3.setColor("blue");
		
		//access directly
		c1.setRadius(4.0);
		System.out.println(c1.getRadius());
		
		System.out.println(c3.getRadius());
		System.out.println(c3.getColor());
		
		System.out.println(c1.toString());//explicit call
		System.out.println(c2); // println() calls toString() automatically
		System.out.println("Operator '+' calls toString() too: " + c2);
	}
}