ex040109.java

来自「我在学习JAVA的讲义」· Java 代码 · 共 12 行

public abstract class  Ex040109{
	public static Integer getIt(){
		Integer rg = new Integer(3);
		Integer dg = rg;
		rg = null;
		return rg;
	}
	public static void main(String[] args){
		Integer i = getIt();
	}
}