Abstract type: Difference between revisions
→{{header|Java}}
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=={{header|Java}}==
Java has an ''interface'' and an ''abstract class''. Neither of which can be instantiated, and require some sort of implementation or abstraction.<br />
For an ''interface'', only the ''private'' and ''default'' access modifiers are allowed, which also implies they require code.<br />
A ''private'' method cannot be overridden by a sub-class, and a ''default'' method, optionally, can.<br />
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Here is an example of a class which ''extends'' an ''abstract class''.
<syntaxhighlight lang="java">
public int methodC(int valueA, int valueB) {
return valueA + valueB;
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