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Commons Collections example source code file (TruePredicate.java)

This example Commons Collections source code file (TruePredicate.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Collections tags/keywords

instance, instance, io, predicate, predicate, serializable, serializable, truepredicate, truepredicate

The Commons Collections TruePredicate.java source code

 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
package org.apache.commons.collections.functors;

import java.io.Serializable;

import org.apache.commons.collections.Predicate;

 * Predicate implementation that always returns true.
 * @since Commons Collections 3.0
 * @version $Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $
 * @author Stephen Colebourne
public final class TruePredicate implements Predicate, Serializable {

    /** Serial version UID */
    private static final long serialVersionUID = 3374767158756189740L;
    /** Singleton predicate instance */
    public static final Predicate INSTANCE = new TruePredicate();

     * Factory returning the singleton instance.
     * @return the singleton instance
     * @since Commons Collections 3.1
    public static Predicate getInstance() {
        return INSTANCE;

     * Restricted constructor.
    private TruePredicate() {

     * Evaluates the predicate returning true always.
     * @param object  the input object
     * @return true always
    public boolean evaluate(Object object) {
        return true;


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