在字符串中寻找和替换一些字符.String就是java中的字符串,用双引号引起来的几个字符.如"Abc","一天".

　　如何创建一个String?

　　1.String s1 = "ABCD"

　　2.String s2 = new String("ABCD")

-In the string search and replacement of some characters. String is a string in java, use double quotation marks to a few characters. Such as " Abc" , " day."　How do I create a String? 1.String s1 = " ABCD"　　2.String s2 = new String ( " ABCD" )