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POJava compiler gives error - No enclosing instance of type
 

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  1. POJava compiler gives error - No enclosing instance of type
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    <p>I design a class:</p> <pre class="lang-java prettyprint-override"><code>public class CustomEvent&lt; P, T &gt; { /** Facade interface used for adopting user interfaces to our generic class. */ public interface ICaller&lt; P, T &gt; { /** callback facade method. */ void call( P parent, T callback, Object... objects ); } /** Abstract class for simplifying naming in constructor. */ public abstract class Caller implements ICaller&lt; P, T &gt;{} /** Constructor. */ public CustomEvent( final String name, final P parent, final Caller caller ){} } </code></pre> <p>Now I want to create a instance of such class:</p> <pre class="lang-java prettyprint-override"><code> public class TestClass { private final TestEvent mEventOnLoad; public TestClass() { // ERROR here: No enclosing instance of type CustomEvent&lt;P,T&gt; is accessible. // Must qualify the allocation with an enclosing instance of type // CustomEvent&lt;P,T&gt; (e.g. x.new A() where x is an instance of CustomEvent&lt;P,T&gt;). mEventOnLoad = new TestEvent( "onLoad", this, new TestEvent.Caller() { public void call( TestClass parent, ITestCallbacks callback, Object... objects ) { // some code here } } ); } private class TestEvent extends CustomEvent&lt; TestClass, ITestCallbacks &gt; { public TestEvent( String name, TestClass parent, TestEvent.Caller caller ) { super( name, parent, caller ); } }; } </code></pre> <p>Is it possible to somehow to workaround that? I want to simplify naming of the classes, instead of long generic declaration use short abstract class name which contains all needed type definitions?</p> <p>I have a filling that it is possible... but I'm not very comfortable with Java yet... </p> <p><strong>Solution</strong></p> <pre class="lang-java prettyprint-override"><code> private class TestEvent extends CustomEvent&lt; TestClass, ITestCallbacks &gt; { public final static TestEvent Instance = new TestEvent( null, null, null ); public TestEvent( String name, TestClass parent, TestEvent.Caller caller ) { super( name, parent, caller ); } }; public TestClass() { mEventOnLoad = new TestEvent( "onLoad", this, TestEvent.Instance.new Caller() { public void call( TestClass parent, ITestCallbacks callback, Object... objects ) { // some code here } } ); } </code></pre>
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    1. USOleksandr Kucherenko
    1. USOleksandr Kucherenko
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