3 · Object-Oriented Core · lesson 13 of 41

Constructors

How new objects are initialized.

Java

public class Point {
    final double x, y;

    public Point(double x, double y) {  // constructor
        this.x = x;
        this.y = y;
    }

    public Point() { this(0, 0); }      // chained constructor
}

Key takeaways

✓Constructors have no return type and share the class name.
✓this(...) chains to another constructor in the same class.

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