substring c# js java

c#

String.SubString(int index,int length)

String.SubString(int start)

等效于

javascript

stringObject.substr(start,length)

stringObject.substr(start)

 java 

* @param      beginIndex   the beginning index, inclusive.
* @param      endIndex     the ending index, exclusive.

public String substring(int beginIndex, int endIndex)

与上面相对应的实现

public static String subString(String src, int startIndex, int length){
    return src.substring(startIndex, startIndex+length);
}

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javascript 

stringObject.substring(start,stop)