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copied!<p>A non-static inner class can access all methods of the enclosing class as if it were it's own methods:</p> <pre><code>public class Test { public int getOne() { return 1; } public class Inner { public int getEnclosingOne() { return getOne(); // this works... } } } </code></pre> <p>A static inner class can not, as a static inner class is not bound to an instance of the parent class. That can only call static methods on the enclosing class.</p> <p>As for methods when taking into account inheritance, an method in a non-static inner class can use all the methods of the enclosing (outer) class.</p> <p>The interesting part is <code>Test2.super.getOne()</code> which indeed obtains getOne() from <code>Test2.super</code>, which is a <code>Test</code>. This is just like Test2 would access the method, namely using <code>super</code> though prefixed with <code>Test2</code> to indicate you're accessing the namespace of the outer class. </p> <pre><code>public class Test2 extends Test { public int getInnerOuterParentOne() { Inner2 inner2 = new Inner2(); return inner2.getOuterParentOne(); } public int getInnerOuterOne() { Inner2 inner2 = new Inner2(); return inner2.getOuterOne(); } public int getOne() { return 2; } public class Inner2 { public int getOuterOne() { return getOne(); } public int getOuterParentOne() { return Test2.super.getOne(); } } public static void main(String[] args) { Test2 test2 = new Test2(); System.out.println(test2.getInnerOuterOne()); // 2 System.out.println(test2.getInnerOuterParentOne()); // 1 } } </code></pre>

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