摘要： public class TestString{ public static void main(String[] args){ String str1 = "123"; String str2 = "456"; String str3 = "678"; StringBuilder sb1 = new StringBuild... 阅读全文

摘要： 1 public class StringTest{ 2 public static void main(String[] args){ 3 String str1 = new String("123"); 4 String str2 = new String("123"); 5 //str1和str2指向不同的内存 6 ... 阅读全文