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POAccessing outer class members from within an inner class extending the outer class itself
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  1. POAccessing outer class members from within an inner class extending the outer class itself
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    copied!<p>In the code snippet shown below, an inner class inherits an outer class itself.</p> <pre><code>package test; class TestInnerClass { private String value; public TestInnerClass(String value) { this.value = value; } private String getValue() { return value; } public void callShowValue() { new InnerClass("Another value").showValue(); } private final class InnerClass extends TestInnerClass { public InnerClass(String value) { super(value); } public void showValue() { System.out.println(getValue()); System.out.println(value); } } } </code></pre> <hr> <pre><code>public final class Test { public static void main(String[] args) { new TestInnerClass("Initial value").callShowValue(); } } </code></pre> <p>The only statement inside the <code>main()</code> method (the last snippet) assigns the value <code>Initial value</code> to the private field <code>value</code> of the <code>TestInnerClass</code> class and then invokes the <code>callShowValue()</code> method.</p> <p>The <code>callShowValue()</code> method causes another string - <code>Another value</code> to be set the to the private field <code>value</code> of the <code>TestInnerClass</code> class before invoking the <code>showValue()</code> method of <code>InnerClass</code> extending <code>TestInnerClass</code>.</p> <p>Accordingly, the following two statements inside the <code>showValue()</code> method,</p> <pre><code>System.out.println(getValue()); System.out.println(value); </code></pre> <p>should display,</p> <blockquote> <p>Another value<br> Another value</p> </blockquote> <p>But they display,</p> <blockquote> <p>Initial value<br> Initial value</p> </blockquote> <p>Why does this happen?</p>
 

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