ifless java

import java.util.function.Supplier;

public class Test {

    public static void main(String...args) {
        new If(true).then(() -> System.out.println("True")).orElse(() -> System.out.println("False"));
    }
    
    public static class If {
        
        boolean b;
        
        public If(boolean b) {
            this.b = b;
        }
        
        public If then(Runnable r) {
            Object tmp = b ? toSupplier(r).get() : null;
            return this;
        }
        
        public If orElse(Runnable r) {
            Object tmp = !b ? toSupplier(r).get() : null;
            return this;
    }
        
        private static Supplier<?> toSupplier(Runnable r) {
            return () -> {
              r.run();
              return null;
            };
        }
        
    }
    
}