Java String Index Of sub(String string, int fromIndex, int toIndex)

Description

sub

License

Open Source License

Declaration

public static String sub(String string, int fromIndex, int toIndex) 

Method Source Code

//package com.java2s;

import java.util.Arrays;

public class Main {
    public static final String EMPTY = "";

    public static String sub(String string, int fromIndex, int toIndex) {
        int len = string.length();

        if (fromIndex < 0) {
            fromIndex = len + fromIndex;

            if (toIndex == 0) {
                toIndex = len;/*from ww w.  ja  v  a 2  s.com*/
            }
        }

        if (toIndex < 0) {
            toIndex = len + toIndex;
        }

        if (toIndex < fromIndex) {
            int tmp = fromIndex;
            fromIndex = toIndex;
            toIndex = tmp;
        }

        if (fromIndex == toIndex) {
            return EMPTY;
        }

        char[] strArray = string.toCharArray();
        char[] newStrArray = Arrays.copyOfRange(strArray, fromIndex, toIndex);
        return new String(newStrArray);
    }
}

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