Java example source code file (MethodReferenceTestVarArgs.java)

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

Learn more about this Java project at its project page.

Java - Java tags/keywords

integer, methodreferencetestvarargs::xivi, methodreferencetestvarargs::xvi, methodreferencetestvarargs\:\:xvo, object, reflection, sai, sao, sii, siii, string, stringbuilder, svi

The MethodReferenceTestVarArgs.java Java example source code

/*
 * Copyright (c) 2012, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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 8003639
 * @summary convert lambda testng tests to jtreg and add them
 * @run testng MethodReferenceTestVarArgs
 */

import org.testng.annotations.Test;
import java.lang.reflect.Array;

import static org.testng.Assert.assertEquals;

/**
 * @author Robert Field
 */

@Test
public class MethodReferenceTestVarArgs {

    interface SII {

        String m(Integer a, Integer b);
    }

    interface Siii {

        String m(int a, int b, int c);
    }

    interface Si {

        String m(int a);
    }

    interface SaO {

        String m(Object[] a);
    }

    interface Sai {

        String m(int[] a);
    }

    interface Svi {

        String m(int... va);
    }

    // These should be processed as var args

    static String xvI(Integer... vi) {
        StringBuilder sb = new StringBuilder("xvI:");
        for (Integer i : vi) {
            sb.append(i);
            sb.append("-");
        }
        return sb.toString();
    }

    static String xIvI(Integer f, Integer... vi) {
        StringBuilder sb = new StringBuilder("xIvI:");
        sb.append(f);
        for (Integer i : vi) {
            sb.append(i);
            sb.append("-");
        }
        return sb.toString();
    }

    static String xvi(int... vi) {
        int sum = 0;
        for (int i : vi) {
            sum += i;
        }
        return "xvi:" + sum;
    }

    static String xIvi(Integer f, int... vi) {
        int sum = 0;
        for (int i : vi) {
            sum += i;
        }
        return "xIvi:(" + f + ")" + sum;
    }

    static String xvO(Object... vi) {
        StringBuilder sb = new StringBuilder("xvO:");
        for (Object i : vi) {
            if (i.getClass().isArray()) {
                sb.append("[");
                int len = Array.getLength(i);
                for (int x = 0; x < len; ++x)  {
                    sb.append(Array.get(i, x));
                    sb.append(",");
                }
                sb.append("]");

            } else {
                sb.append(i);
            }
            sb.append("*");
        }
        return sb.toString();
    }

    public void testVarArgsSuperclass() {
        SII q;

        q = MethodReferenceTestVarArgs::xvO;
        assertEquals(q.m(55,66), "xvO:55*66*");
    }

    public void testVarArgsArray() {
        Sai q;

        q = MethodReferenceTestVarArgs::xvO;
        assertEquals(q.m(new int[] { 55,66 } ), "xvO:[55,66,]*");
    }

    public void testVarArgsII() {
        SII q;

        q = MethodReferenceTestVarArgs::xvI;
        assertEquals(q.m(33,7), "xvI:33-7-");

        q = MethodReferenceTestVarArgs::xIvI;
        assertEquals(q.m(50,40), "xIvI:5040-");

        q = MethodReferenceTestVarArgs::xvi;
        assertEquals(q.m(100,23), "xvi:123");

        q = MethodReferenceTestVarArgs::xIvi;
        assertEquals(q.m(9,21), "xIvi:(9)21");
    }

    public void testVarArgsiii() {
        Siii q;

        q = MethodReferenceTestVarArgs::xvI;
        assertEquals(q.m(3, 2, 1), "xvI:3-2-1-");

        q = MethodReferenceTestVarArgs::xIvI;
        assertEquals(q.m(888, 99, 2), "xIvI:88899-2-");

        q = MethodReferenceTestVarArgs::xvi;
        assertEquals(q.m(900,80,7), "xvi:987");

        q = MethodReferenceTestVarArgs::xIvi;
        assertEquals(q.m(333,27, 72), "xIvi:(333)99");
    }

    public void testVarArgsi() {
        Si q;

        q = MethodReferenceTestVarArgs::xvI;
        assertEquals(q.m(3), "xvI:3-");

        q = MethodReferenceTestVarArgs::xIvI;
        assertEquals(q.m(888), "xIvI:888");

        q = MethodReferenceTestVarArgs::xvi;
        assertEquals(q.m(900), "xvi:900");

        q = MethodReferenceTestVarArgs::xIvi;
        assertEquals(q.m(333), "xIvi:(333)0");
    }

    // These should NOT be processed as var args

    public void testVarArgsaO() {
        SaO q;

        q = MethodReferenceTestVarArgs::xvO;
        assertEquals(q.m(new String[] { "yo", "there", "dude" }), "xvO:yo*there*dude*");
    }


}