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Groovy example source code file (InterfaceTest.groovy)

This example Groovy source code file (InterfaceTest.groovy) is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

charsequence, charsequence, compilabletestsupport, i1, interfacetest, n, number, t, t, u, u, v, v, w

The Groovy InterfaceTest.groovy source code

 * Copyright 2003-2011 the original author or authors.
 * Licensed 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package groovy

import gls.CompilableTestSupport

class InterfaceTest extends CompilableTestSupport {

    void testGenericsInInterfaceMembers() {
        // control
        shouldCompile """
        interface I1 {
            public <T> T copy1(T arg)
            public <U extends CharSequence> U copy2(U arg)
            public <V, W> V copy3(W arg)
            public <N extends Number> void foo()
        // erroneous
        shouldNotCompile "interface I2 { public <?> copy1(arg) }"
        shouldNotCompile "interface I3 { public <? extends CharSequence> copy1(arg) }"

Other Groovy examples (source code examples)

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