这个算是java的bug吗

package test;

import java.util.Map;

public class Test {
	public static void main(String[] args) {
		Map m = null;
		System.out.println("haha" + m==null?"null":m.get("d"));
	}
}

运行后：
Exception in thread "main" java.lang.NullPointerException
at test.Test.main(Test.java:8)