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Leonid Shalupovandintellij-monorepo-bot
40795fe787
GitOrigin-RevId: 8b2b63fc6db476ca0c2cfe5cadd84db6c4236d0f
48 lines
1.3 KiB
HTML
48 lines
1.3 KiB
HTML
<html>
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<body>
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Reports <code>abstract</code> classes that can be converted to interfaces.
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<p>Using interfaces instead of classes is preferable as Java doesn't support multiple class inheritance,
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while a class can implement multiple interfaces.</p>
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<p>A class may be converted to an interface if it has no superclasses (other
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than Object), has only <code>public static final</code> fields,
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<code>public abstract</code> methods, and <code>public</code> inner classes.
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<!-- tooltip end -->
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<p>Example:</p>
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<pre><code>
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abstract class Example {
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public static final int MY_CONST = 42;
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public abstract void foo();
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}
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class Inheritor extends Example {
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@Override
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public void foo() {
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System.out.println(MY_CONST);
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}
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}
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</code></pre>
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<p>After the quick-fix is applied:</p>
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<pre><code>
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interface Example {
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int MY_CONST = 42;
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void foo();
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}
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class Inheritor implements Example {
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@Override
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public void foo() {
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System.out.println(MY_CONST);
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}
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}
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</code></pre>
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<p>Configure the inspection:</p>
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<p>
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Use the <b>Report classes containing non-abstract methods when using Java 8</b> option to report only the classes with <code>static</code> methods and non-abstract methods that can be converted to
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<code>default</code> methods (only applicable to language level of 8 or higher).
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<p>
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</body>
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</html> |