将PHP转换为Java

Question

I have worked with PHP for 6 years now and am certified in it, but lately I have decided that I should learn Java, as I worked a lot with the Zend framework, which is inspired by Java, but now I have what is, perhaps, a stupid problem with Java.

In PHP I would do this:

class Cool
{
    protected $_name;

    function __construct($name)
    {
        $this->_name = $name;
    }

    function showName()
    {
        echo "{$this->_name} is a cool guy";
    }
}

class Bad extends Cool
{
    function showName()
    {
        echo "{$this->_name} is a bad guy";
    }
}

$bad = new Bad("jhon");
// prints jhon is a bad guy

Since Java doesn't inherit constructors, what would be the best way to do something like this in Java? Will I have to think of a different type of patterns to solve this kind of thing?

I appreciate the help since I'm really new to Java and since I use this kind of thing a lot I'd like to know if there's any cool way to do it in Java. I need to use it on a new project I'm getting assigned to.

Answer 1

In Java, you'll have to write a constructor for each class and call super() to use the parent's constructor. If you don't want to alter the constructor, all you need to do in the subclass constructor is call super().

In this case, Bad would look like this:

public class Bad extends Cool {
    public Bad(String name) {
        super(name);
    }
    // Any other additions
}