Java String Chomp chomp(String str)

Description

chomp

License

Apache License

Declaration

public static String chomp(String str) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

public class Main {
    public static String chomp(String str) {
        if (isEmpty(str)) {
            return str;
        }// w w w . ja v a 2 s .  c o m
        if (str.length() == 1) {
            char ch = str.charAt(0);
            if ((ch == '\r') || (ch == '\n')) {
                return "";
            }
            return str;
        }
        int lastIdx = str.length() - 1;
        char last = str.charAt(lastIdx);
        if (last == '\n') {
            if (str.charAt(lastIdx - 1) == '\r') {
                lastIdx--;
            }
        } else if (last != '\r') {
            lastIdx++;
        }
        return str.substring(0, lastIdx);
    }

    public static String chomp(String str, String separator) {
        if ((isEmpty(str)) || (separator == null)) {
            return str;
        }
        if (str.endsWith(separator)) {
            return str.substring(0, str.length() - separator.length());
        }
        return str;
    }

    public static boolean isEmpty(String str) {
        return (str == null) || (str.length() == 0);
    }

    public static String substring(String str, int start) {
        if (str == null) {
            return null;
        }
        if (start < 0) {
            start = str.length() + start;
        }
        if (start < 0) {
            start = 0;
        }
        if (start > str.length()) {
            return "";
        }
        return str.substring(start);
    }

    public static String substring(String str, int start, int end) {
        if (str == null) {
            return null;
        }
        if (end < 0) {
            end = str.length() + end;
        }
        if (start < 0) {
            start = str.length() + start;
        }
        if (end > str.length()) {
            end = str.length();
        }
        if (start > end) {
            return "";
        }
        if (start < 0) {
            start = 0;
        }
        if (end < 0) {
            end = 0;
        }
        return str.substring(start, end);
    }
}

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