test72.java

SCJP认证考试资料

public class Test72 {
    public void m(String s) {
	System.out.println("My String");
    }
    public void m(StringBuffer sb) {
	System.out.println("My StringBuffer");
    }
    public void m(Object sb) {
	System.out.println("my object");
    }
    public static void main(String[] args) {
	Test72 t = new Test72();
	t.m(null);
    }
}