请问各位大神哪儿错了
public class HelloWorld{ public static void main(String[] args) { int a=16; double b=9.5; String str1="hello"; String str2="imooc"; System.out.println("a等于b:" + (a==b)); System.out.println("a大于b:" + (a>b)); System.out.println("a小于等于b:" + (a<b)); System.out.println("str1等于str2:" + (str1==str2)); } }