Default Value Guide

Default Value

Feature Overview

This feature sets the default value for method parameters.

Prerequisite

None

Sweet Apex Example

public class DefaultValueDemo {
    public static Integer init() {
        return 0;
    }

    public static Integer add(
        @defaultValue(init()) Integer a,
        Integer b = init()
    ) {
        return a + b;
    }
}

​x
 
public class DefaultValueDemo {
    public static Integer init() {
        return 0;
    }
​
    public static Integer add(
        @defaultValue(init()) Integer a,
        Integer b = init()
    ) {
        return a + b;
    }
}

Transpiled Apex

public class DefaultValueDemo {
    public static Integer init() {
        return 0;
    }
    public static Integer add(Integer a, Integer b) {
        a = (a == null) ? init() : a;
        b = (b == null) ? init() : b;

        return a + b;
    }
}

 
public class DefaultValueDemo {
    public static Integer init() {
        return 0;
    }
    public static Integer add(Integer a, Integer b) {
        a = (a == null) ? init() : a;
        b = (b == null) ? init() : b;
​
        return a + b;
    }
}

Usage

@defaultValue can only be applied to method parameters.

Or you can append = ... expressions to the parameter name.

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