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Java example source code file (TargetTypes.java)

This example Java source code file (TargetTypes.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

annotation, arraylist, class, exception, inputstream, integer, list, object, string, t0x03, t0x06, t0x18, t0x19, util

The TargetTypes.java Java example source code

/*
 * Copyright (c) 2009, 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.
 */
import java.lang.annotation.*;
import static java.lang.annotation.ElementType.*;

import java.util.*;
import java.io.*;

/*
 * @Xtest
 * @summary compiler accepts all values
 * @author Mahmood Ali
 * @author Yuri Gaevsky
 * @compile TargetTypes.java
 */

@Target({TYPE_USE, TYPE_PARAMETER, TYPE})
@Retention(RetentionPolicy.RUNTIME)
@interface A {}

/** wildcard bound */
class T0x1C {
    void m0x1C(List<? extends @A String> lst) {}
}

/** wildcard bound generic/array */
class T0x1D<T> {
    void m0x1D(List<? extends @A List lst) {}
}

/** typecast */
class T0x00 {
    void m0x00(Long l1) {
        Object l2 = (@A Long) l1;
    }
}

/** typecast generic/array */
class T0x01<T> {
    void m0x01(List<T> list) {
        List<T> l = (List<@A T>) list;
    }
}

/** instanceof */
class T0x02 {
    boolean m0x02(String s) {
        return (s instanceof @A String);
    }
}

/** object creation (new) */
class T0x04 {
    void m0x04() {
        new @A ArrayList<String>();
    }
}

/** local variable */
class T0x08 {
    void m0x08() {
      @A String s = null;
    }
}

/** method parameter generic/array */
class T0x0D {
    void m0x0D(HashMap<@A Object, List<@A List<@A Class>>> s1) {}
}

/** method receiver */
class T0x06 {
    void m0x06(@A T0x06 this) {}
}

/** method return type generic/array */
class T0x0B {
    Class<@A Object> m0x0B() { return null; }
}

/** field generic/array */
class T0x0F {
    HashMap<@A Object, @A Object> c1;
}

/** method type parameter */
class T0x20<T, U> {
    <@A T, @A U> void m0x20() {}
}

/** class type parameter */
class T0x22<@A T, @A U> {
}

/** class type parameter bound */
class T0x10<T extends @A Object> {
}

/** method type parameter bound */
class T0x12<T> {
    <T extends @A Object> void m0x12() {}
}

/** class type parameter bound generic/array */
class T0x11<T extends List<@A T>> {
}


/** method type parameter bound generic/array */
class T0x13 {
    static <T extends Comparable<@A T>> T m0x13() {
        return null;
    }
}

/** class extends/implements generic/array */
class T0x15<T> extends ArrayList<@A T> {
}

/** type test (instanceof) generic/array */
class T0x03<T> {
    void m0x03(T typeObj, Object obj) {
        boolean ok = obj instanceof String @A [];
    }
}

/** object creation (new) generic/array */
class T0x05<T> {
    void m0x05() {
        new ArrayList<@A T>();
    }
}

/** local variable generic/array */
class T0x09<T> {
    void g() {
        List<@A String> l = null;
    }

    void a() {
        String @A [] as = null;
    }
}

/** type argument in constructor call generic/array */
class T0x19 {
    <T> T0x19() {}

    void g() {
       new <List<@A String>> T0x19();
    }
}

/** type argument in method call generic/array */
class T0x1B<T> {
    void m0x1B() {
        Collections.<T @A []>emptyList();
    }
}

/** type argument in constructor call */
class T0x18<T> {
    <T> T0x18() {}

    void m() {
        new <@A Integer> T0x18();
    }
}

/** type argument in method call */
class T0x1A<T,U> {
    public static <T, U> T m() { return null; }
    static void m0x1A() {
        T0x1A.<@A Integer, @A Short>m();
    }
}

/** class extends/implements */
class T0x14 extends @A Object implements @A Serializable, @A Cloneable {
}

/** exception type in throws */
class T0x16 {
    void m0x16() throws @A Exception {}
}

/** resource variables **/
class ResourceVariables {
    void m() throws Exception {
        try (@A InputStream is = new @A FileInputStream("x")){}
    }
}

/** exception parameters **/
class ExceptionParameters {
    void multipleExceptions() {
        try {
            new Object();
        } catch (@A Exception e) {}
        try {
            new Object();
        } catch (@A Exception e) {}
        try {
            new Object();
        } catch (@A Exception e) {}
    }
}

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