Java isAssignableFrom example 2017-05-11 08:09
The isAssignableFrom method is used to judge the relationship of two classes. This method can tell you whether A is the subclass of B. or A class implement B interface. The example code is here.
public class TestImpClazz implements TestInterface {
}
interface TestInterface {
}
public class TestSubClazz extends TestImpClazz {
}
public class TestIsAssignedFrom {
public static void main(String[] args) {
System.out.println(TestInterface.class.isAssignableFrom(TestImpClazz.class));
System.out.println(TestImpClazz.class.isAssignableFrom(TestSubClazz.class));
System.out.println(TestImpClazz.class.isAssignableFrom(TestImpClazz.class));
System.out.println(TestImpClazz.class.isAssignableFrom(TestInterface.class));
System.out.println(TestSubClazz.class.isAssignableFrom(TestImpClazz.class));
}
}
The output:
true
true
true
false
false
EOF