JavaSE8 Base string substring returns the character within the range of the specified index value in a string

Os:windows7 x64
Jdk:jdk-8u131-windows-x64
Ide:eclipse Oxygen Release (4.7.0)


Code

Package Jizuiku.t00;public class Demo5 {public static void main (string[] args) {//Index value                   012345String str = "abc012345432 10CBA "; int beginindex = 2;int EndIndex = 5;//does not include the character corresponding to this index, why? Look at the source code, you know. System.out.println (Str.substring (Beginindex, EndIndex));}}

Result

Scourecode:

    Public String substring (int beginindex, int endIndex) {        if (Beginindex < 0) {            throw new Stringindexoutofboundse Xception (Beginindex);        }        if (EndIndex > Value.length) {            throw new stringindexoutofboundsexception (EndIndex);        }        int sublen = Endindex-beginindex;        if (Sublen < 0) {            throw new stringindexoutofboundsexception (Sublen);        }        Return ((Beginindex = = 0) && (endIndex = = value.length))? This                : New String (Value, Beginindex, Sublen);    }

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JavaSE8 Base string substring returns the character within the range of the specified index value in a string