Java String Char Count countChar(String src, char c)

Description

count Char

License

Apache License

Declaration

public static int countChar(String src, char c) 

Method Source Code

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

public class Main {
    public static int countChar(String src, char c) {
        if (isNullOrNone(src)) {
            return 0;
        }/*from   www .  j a  v a 2  s  . c o m*/

        int k = 0;
        for (int i = 0; i < src.length(); i++) {
            if (src.charAt(i) == c) {
                k++;
            }
        }

        return k;
    }

    public static boolean isNullOrNone(String s) {
        if (s == null || "".equals(s.trim())) {
            return true;
        }

        return false;
    }

    public static boolean isNullOrNone(Object obj) {
        if (obj == null) {
            return true;
        }
        if (obj instanceof String) {
            return isNullOrNone((String) obj);
        }
        return false;
    }

    public static boolean isNullOrNone(String[] ss) {
        if (ss == null || ss.length == 0) {
            return true;
        }

        for (int i = 0; i < ss.length; i++) {
            if (ss[i] == null || "".equals(ss[i].trim())) {
                return true;
            }
        }

        return false;
    }
}

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