首先我们从一道判断题开始: String s1 = “hello”; String s2 = “world”; String s = “helloworld”; String s3 = “hello” + “world…
String/StringBuffer/StringBuilder的区别 String:不可变的字符序列 StringBuffer:可变的字符…
首先我们从一道判断题开始: String s1 = “hello”; String s2 = “world”; String s = “helloworld”; String s3 = “hello” + “world…
String/StringBuffer/StringBuilder的区别 String:不可变的字符序列 StringBuffer:可变的字符…