Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
import android.text.TextUtils;

public class Main {
    public static String DEFAULT_EMPTY = "";

    /**
     *
     * @param str
     * @return
     */
    public static String isEmptyOrNull(String str) {
        if (TextUtils.isEmpty(str)) {
            return DEFAULT_EMPTY;
        }
        return str;
    }

    /**
     * is null or its length is 0
     *
     * <pre>
     * isEmpty(null) = true;
     * isEmpty(&quot;&quot;) = true;
     * isEmpty(&quot;  &quot;) = false;
     * </pre>
     *
     * @param str
     * @return if string is null or its size is 0, return true, else return false.
     */
    public static boolean isEmpty(CharSequence str) {
        return (str == null || str.length() == 0);
    }

    /**
     * get length of CharSequence
     *
     * <pre>
     * length(null) = 0;
     * length(\"\") = 0;
     * length(\"abc\") = 3;
     * </pre>
     *
     * @param str
     * @return if str is null or empty, return 0, else return {@link CharSequence#length()}.
     */
    public static int length(CharSequence str) {
        return str == null ? 0 : str.length();
    }
}