5.9-2比较str1和str2截取后的子串

 package zfc;

 public class ZfcShcq {

     public static void main(String[] args) {
         // TODO Auto-generated method stub

         String str1 = "Hello World !";//创建两个字符串
         String str2 = "Oracle Java";

         String s1 = str1.substring(7,9);//分别截取子串
         String s2 = str2.substring(0,2);

 //        System.out.println(s1);//用于调试，查看子串
 //        System.out.println(s2);

         if(s1.equalsIgnoreCase(s2))//比较子串，不区分大小写
         {
             System.out.println("两个子串相同");
         }
         else
         {
             System.out.println("两个子串并不相同");
         }

         }

 }