staticmethoddemo2.java

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// 例2.3.4  StaticMethodDemo2.java  
class ChangeType
{
	private int a1;
private float a2;
	static String a3;
	public ChangeType()   // 构造函数初始化
{  
	    a1 = Integer.parseInt("31416");
	    a2 = Float.parseFloat("3.1416");
	    a3 = "3.1416";
	}
	public static void prtStr()
{
		System.out.println("a3 = "+a3);
	}
	public void prt()
{
		prtStr();    // 在非静态方法中访问静态方法
		System.out.println("a1 = "+a1+" a2 = "+a2);
	}
	
}
public class StaticMethodDemo2
{
	public static void main(String[] args)
{
		ChangeType.prtStr();
		ChangeType ct = new ChangeType();  // 创建一个实例对象
		ct.prt();
		System.out.println(ChangeType.a3);
		System.out.println(ct.a3);
	    ct.prtStr();
	}
}