方法如下:
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public String substring( int beginIndex, int endIndex) |
第一個int為開始的索引,對應(yīng)String數(shù)字中的開始位置,
第二個是截止的索引位置,對應(yīng)String中的結(jié)束位置
1、取得的字符串長度為:endIndex - beginIndex;
2、從beginIndex開始取,到endIndex結(jié)束,從0開始數(shù),其中不包括endIndex位置的字符
如:
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"hamburger" .substring( 4 , 8 ) returns "urge" "smiles" .substring( 1 , 5 ) returns "mile" |
取長度大于等于3的字符串a(chǎn)的后三個子字符串,只需a.subString(a.length()-3, a.length());
手冊中的具體說明如下:
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
以上就是小編為大家?guī)淼臏\談Java的String中的subString()方法的全部內(nèi)容了,希望對大家有所幫助,多多支持服務(wù)器之家~