import org.junit.Test;

import java.util.Arrays;

import java.util.List;

import java.util.function.Supplier;

public class SupplierTest {

// Pass Supplier function interface as an argument to printAccess(Supplier<Boolean> supplier) method

@Test

public void supplierTest1() {

String password = "valid";

printAccess(() -> { // anonymous interface implementation. not an anonymous function

if (password.equals("valid"))

return true;

else

return false;

});

}

private void printAccess(Supplier<Boolean> supplier) {

if(supplier.get() == true) // get just executes the body of anonymous interface implementation defined (if-else statement) above? YES

System.out.println("Correct password - unlocked");

else

System.out.println("Incorrect password - locked");

}

// Override Supplier get() method

@Test

public void supplierOverrideTest2() {

Supplier<String> supplier = new Supplier() {

@Override

public String get() {

return "supplier get() override";

}

};

System.out.println(supplier.get());

}

}