Checks if the String contains any character in the given set of characters. A null String will return false. - Java java.lang

Java examples for java.lang:String Contain

  1. HOME
  2. Java
  3. java.lang
  4. String Contain

Description

Checks if the String contains any character in the given set of characters. A null String will return false.

Demo Code

/*/*from   w w w  . jav  a 2 s.  c o m*/
 * Copyright 2013 Guidewire Software, Inc.
 */
/**
 * This class is based, in part, on org.apache.commons.lang.StringUtils and is intended
 * to break the dependency on that project.
 *
 * @author <a href="http://jakarta.apache.org/turbine/">Apache Jakarta Turbine</a>
 * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a>
 * @author Daniel L. Rall
 * @author <a href="mailto:gcoladonato@yahoo.com">Greg Coladonato</a>
 * @author <a href="mailto:ed@apache.org">Ed Korthof</a>
 * @author <a href="mailto:rand_mcneely@yahoo.com">Rand McNeely</a>
 * @author Stephen Colebourne
 * @author <a href="mailto:fredrik@westermarck.com">Fredrik Westermarck</a>
 * @author Holger Krauth
 * @author <a href="mailto:alex@purpletech.com">Alexander Day Chaffee</a>
 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
 * @author Arun Mammen Thomas
 * @author Gary Gregory
 * @author Phil Steitz
 * @author Al Chou
 * @author Michael Davey
 * @author Reuben Sivan
 * @author Chris Hyzer
 *  Johnson

 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) {
        String str = "java2s.com";
        char[] searchChars = new char[] { 'b', 'o', 'o', 'k', '2', 's',
                '.', 'c', 'o', 'm', 'a', '1', };
        System.out.println(containsAny(str, searchChars));
    }

    /**
     * <p>Checks if the String contains any character in the given
     * set of characters.</p>
     *
     * <p>A <code>null</code> String will return <code>false</code>.
     * A <code>null</code> or zero length search array will return <code>false</code>.</p>
     *
     * <pre>
     * containsAny(null, *)                = false
     * containsAny("", *)                  = false
     * containsAny(*, null)                = false
     * containsAny(*, [])                  = false
     * containsAny("zzabyycdxx",['z','a']) = true
     * containsAny("zzabyycdxx",['b','y']) = true
     * containsAny("aba", ['z'])           = false
     * </pre>
     *
     * @param str  the String to check, may be null
     * @param searchChars  the chars to search for, may be null
     * @return the <code>true</code> if any of the chars are found,
     * <code>false</code> if no match or null input
     * @since 2.4
     */
    public static boolean containsAny(String str, char[] searchChars) {
        if (str == null || str.length() == 0 || searchChars == null
                || searchChars.length == 0) {
            return false;
        }
        for (int i = 0; i < str.length(); i++) {
            char ch = str.charAt(i);
            for (int j = 0; j < searchChars.length; j++) {
                if (searchChars[j] == ch) {
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * <p>
     * Checks if the String contains any character in the given set of characters.
     * </p>
     *
     * <p>
     * A <code>null</code> String will return <code>false</code>. A <code>null</code> search string will return
     * <code>false</code>.
     * </p>
     *
     * <pre>
     * containsAny(null, *)            = false
     * containsAny("", *)              = false
     * containsAny(*, null)            = false
     * containsAny(*, "")              = false
     * containsAny("zzabyycdxx", "za") = true
     * containsAny("zzabyycdxx", "by") = true
     * containsAny("aba","z")          = false
     * </pre>
     *
     * @param str
     *            the String to check, may be null
     * @param searchChars
     *            the chars to search for, may be null
     * @return the <code>true</code> if any of the chars are found, <code>false</code> if no match or null input
     * @since 2.4
     */
    public static boolean containsAny(String str, String searchChars) {
        if (searchChars == null) {
            return false;
        }
        return containsAny(str, searchChars.toCharArray());
    }

    /**
     * Gets a String's length or <code>0</code> if the String is <code>null</code>.
     *
     * @param str
     *            a String or <code>null</code>
     * @return String length or <code>0</code> if the String is <code>null</code>.
     * @since 2.4
     */
    public static int length(String str) {
        return str == null ? 0 : str.length();
    }
}

Related Tutorials