Static methods in Java

Overloading stands in for the default parameters Java never got.

System.out.println(Greeter.hello("Ada"));
System.out.println(Greeter.hello("Grace", true));
System.out.println(Greeter.area(3, 4));

class Greeter {
    // Java overloads instead of defaulting parameters
    static String hello(String name) { return hello(name, false); }

    static String hello(String name, boolean shout) {
        var text = "hello, " + name;
        return shout ? text.toUpperCase() : text;
    }

    static double area(double width, double height) {
        return width * height / 2;
    }
}

How it works

1. The one-argument hello forwards to the two-argument version.
2. Overloads share a name and differ by signature.
3. Classes can sit below the code that calls them in the same file.

Keywords and builtins used here

• Greeter
• area
• boolean
• class
• double
• hello
• return
• static
• var

The run, in numbers

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Step 1 of 3 in Methods & lambdas, step 15 of 29 in Language basics.

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