I have list of classes:
List<Class<?>> = Array.asList(ClassA, ClassB, ClassC, ClassD);
each of them has a static method staticMethod(byte[] bytes)
How can I iterate through this list of classes and calling the staticMethod?
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Answer
Represent your List like lambda expressions for your static methods.
List<Consumer<byte[]>> functionsList = Arrays.asList(ClassA::staticMethod, ClassB::staticMethod);
byte[] bytes = new byte[] {1, 2, 3, 4, 5};
functionsList.forEach(consumer -> consumer.accept(bytes));
Full code:
import java.util.Arrays;
import java.util.List;
import java.util.function.Consumer;
public class Main {
public static void main(String args[]){
List<Consumer<byte[]>> functionsList = Arrays.asList(ClassA::staticMethod, ClassB::staticMethod);
byte[] bytes = new byte[] {1, 2, 3, 4, 5};
functionsList.forEach(consumer -> consumer.accept(bytes));
}
}
public class ClassA {
public static void staticMethod(byte[] bytes) {
System.out.println("ClassA.staticMethod(byte[] bytes)" + Arrays.toString(bytes));
}
}
public class ClassB {
public static void staticMethod(byte[] bytes) {
System.out.println("ClassB.staticMethod(byte[] bytes)" + Arrays.toString(bytes));
}
}
Output:
ClassA.staticMethod(byte[] bytes)[1, 2, 3, 4, 5] ClassB.staticMethod(byte[] bytes)[1, 2, 3, 4, 5]
EDIT: Example for methods with return value:
import java.util.Arrays;
import java.util.List;
import java.util.function.Function;
public class Main {
public static void main(String args[]){
byte[] bytes = new byte[] {1, 2, 3, 4, 5};
List<Function<byte[], String>> functionsList = Arrays.asList(ClassA::staticMethodWithReturn, ClassB::staticMethodWithReturn);
functionsList.forEach(function -> {
String returnValue = function.apply(bytes);
}
);
}
}
public class ClassA {
public static String staticMethodWithReturn(byte[] bytes) {
return "";
}
}
public class ClassB {
public static String staticMethodWithReturn(byte[] bytes) {
return "";
}
}