String s1 ="ab";
String s2 ="abc";
String s3 = s1 + "c";
System.out.println(s3 == s2);
System.out.println(s3.equals(s2));

创建了几个对象？

String s1 ="ab";
String s2 ="abc";
String s3 = s1 + "c";
System.out.println(s3 == s2);
System.out.println(s3.equals(s2));

创建了几个对象？