String a = "abc";
String b = "ab" + "c";
System.out.println(a==b);//true?
String c="cd";
String d=c+"ef";
String e="cdef";
System.out.println(c==e);//false?
String b = "ab" + "c";
System.out.println(a==b);//true?
String c="cd";
String d=c+"ef";
String e="cdef";
System.out.println(c==e);//false?
解决方案 »
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