trim string from both side - Java java.lang

Java examples for java.lang:String Trim

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Description

trim string from both side

Demo Code

//package com.java2s;

public class Main {
    public static String trim(String string, Character... charsToTrim) {
        return trimEnd(trimStart(string, charsToTrim), charsToTrim);
    }//from  w w  w .j  a  v  a 2s. com

    public static String trim(String s, char[] cs) {
        Character[] chars = new Character[cs.length];
        for (int i = 0; i < cs.length; i++)
            chars[i] = cs[i];

        return trim(s, chars);
    }

    public static String trimEnd(String string, Character... charsToTrim) {
        if (string == null || charsToTrim == null)
            return string;

        int lengthToKeep = string.length();
        for (int index = string.length() - 1; index >= 0; index--) {
            boolean removeChar = false;
            if (charsToTrim.length == 0) {
                if (Character.isSpace(string.charAt(index))) {
                    lengthToKeep = index;
                    removeChar = true;
                }
            } else {
                for (int trimCharIndex = 0; trimCharIndex < charsToTrim.length; trimCharIndex++) {
                    if (string.charAt(index) == charsToTrim[trimCharIndex]) {
                        lengthToKeep = index;
                        removeChar = true;
                        break;
                    }
                }
            }
            if (!removeChar)
                break;
        }
        return string.substring(0, lengthToKeep);
    }

    public static String trimStart(String string, Character... charsToTrim) {
        if (string == null || charsToTrim == null)
            return string;

        int startingIndex = 0;
        for (int index = 0; index < string.length(); index++) {
            boolean removeChar = false;
            if (charsToTrim.length == 0) {
                if (Character.isSpace(string.charAt(index))) {
                    startingIndex = index + 1;
                    removeChar = true;
                }
            } else {
                for (int trimCharIndex = 0; trimCharIndex < charsToTrim.length; trimCharIndex++) {
                    if (string.charAt(index) == charsToTrim[trimCharIndex]) {
                        startingIndex = index + 1;
                        removeChar = true;
                        break;
                    }
                }
            }
            if (!removeChar)
                break;
        }
        return string.substring(startingIndex);
    }
}

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