Java String Capitalize capitalize(String str)

Description

Capitalizes a string, i.e.

License

Apache License

Parameter

Parameter	Description
str	The String that needs to be capitalized.

Return

The capitalized string.

Declaration

public static String capitalize(String str) 

Method Source Code

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

public class Main {
    /**//from  w w w  . j av a  2 s  .  c  o m
     * Capitalizes a string, i.e. changing its first letter to uppercase.
     * 
     * @param str The String that needs to be capitalized.
     * @return The capitalized string.
     */
    public static String capitalize(String str) {
        if (str == null || str.length() == 0)
            return str;
        else
            return str.substring(0, 1).toUpperCase() + str.substring(1);
    }

    /**
     * convert to uppercase.
     * 
     * @param list input list
     * @return converted array
     */
    public static String[] toUpperCase(String[] list) {
        if (isNullOrEmpty(list))
            return list;
        String[] newList = new String[list.length];
        for (int i = 0; i < list.length; i++) {
            newList[i] = list[i].toUpperCase();
        }
        return newList;
    }

    /**
     * Returns true if the data is null or empty string.
     * 
     * @param data data
     * @return boolean
     */
    public static boolean isNullOrEmpty(String data) {
        return data == null || data.trim().length() == 0;
    }

    /**
     * Returns true if the data is null or empty string array (length == 0).
     * 
     * @param data data
     * @return boolean
     */
    public static boolean isNullOrEmpty(String[] data) {
        return data == null || data.length == 0;
    }
}

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