Java的String中的subString()方法,stringsubstring
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Java的String中的subString()方法,stringsubstring
方法如下: public String substring(int beginIndex, int endIndex) 第一个int为开始的索引,对应String数字中的开始位置, 第二个是截止的索引位置,对应String中的结束位置 1、取得的字符串长度为:endIndex - beginIndex; 2、从beginIndex开始取,到endIndex结束,从0开始数,其中不包括endIndex位置的字符 如: "hamburger".substring(4, 8) returns "urge" "smiles".substring(1, 5) returns "mile" 取长度大于等于3的字符串a的后三个子字符串,只需a.subString(a.length()-3, a.length());手册中的具体说明如下: substring public String substring(int beginIndex, int endIndex) Returns a new string that is a substring of this string. The substring begins at the specified beginIndex and extends to the character at index endIndex - 1. Thus the length of the substring is endIndex-beginIndex. Examples:
"hamburger".substring(4, 8) returns "urge" "smiles".substring(1, 5) returns "mile" Parameters: beginIndex - the beginning index, inclusive. endIndex - the ending index, exclusive. Returns: the specified substring. Throws: IndexOutOfBoundsException - if the beginIndex is negative, or endIndex is larger than the length of this String object, or beginIndex is larger than endIndex.
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