Java example source code file (ArrayMethods.java)

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Java - Java tags/keywords

arraymethods, class, method, nosuchmethodexception, reflection, runtimeexception, test, util

The ArrayMethods.java Java example source code

/*
 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/* @test
 * @bug 4987375
 * @summary make sure clone() isn't reflected and that Cloneable and
 *          Serializable are found
 */

import java.lang.reflect.*;
import java.util.Arrays;

public class ArrayMethods {
    public int failed = 0;

    public static void main(String[] args) throws Exception {
        ArrayMethods m = new ArrayMethods();

        m.testGetMethod();
        m.testGetMethods();
        m.testGetDeclaredMethod();
        m.testGetDeclaredMethods();
        m.testGetInterfaces();

        if (m.failed != 0)
            throw new RuntimeException("Test failed, check log for details");
    }

    public void testGetMethod() {
        try {
            Method m = new String[0].getClass().getMethod("clone", (Class<?>[])null);

            failed++;
            System.out.println("getMethod(\"clone\", null) Should not find clone()");
        } catch (NoSuchMethodException e) {
            ; //all good
        }
    }

    public void testGetMethods() {
        Method[] m = new Integer[0][0][0].getClass().getMethods();
        for (Method mm : m)
            if(mm.getName().contentEquals("clone")) {
                failed++;
                System.out.println("getMethods() Should not find clone()");
            }
    }

    public void testGetDeclaredMethod() {
        try {
            Method m = new Object[0][0].getClass().getDeclaredMethod("clone", (Class<?>[])null);

            failed++;
            System.out.println("getDeclaredMethod(\"clone\", null) Should not find clone()");

        } catch (NoSuchMethodException e) {
            ; //all good
        }
    }

    public void testGetDeclaredMethods() {
        Method[] m = new Throwable[0][0][0][0].getClass().getDeclaredMethods();
        if (m.length != 0) {
            failed++;
            System.out.println("getDeclaredMethods().length should be 0");
        }
    }

    public void testGetInterfaces() {
        Class<?>[] is = new Integer[0].getClass().getInterfaces();
        boolean thisFailed = false;

        if (is.length != 2)
            thisFailed = true;

        if (!is[0].getCanonicalName().equals("java.lang.Cloneable"))
            thisFailed = true;

        if (!is[1].getCanonicalName().equals("java.io.Serializable"))
            thisFailed = true;

        if (thisFailed) {
            failed++;
            System.out.println(Arrays.asList(is));
            System.out.println("Should contain exactly Cloneable, Serializable in that order.");
        }
    }
}