Nullable Guide

Nullable

Feature Overview

This feature adds support for nullable variables.

Prerequisite

None

Sweet Apex Example

public class NullableDemo {
    public static void main() {
        String s1 = 'abc';
        Integer i1 = s1.length();

        String s2 = null;
        Integer i2 = s2?.length();

        Integer i3 = ('a' + 'b')?.length();
    }
}

Transpiled Apex

public class NullableDemo {
    public static void main() {
        String s1 = 'abc';
        Integer i1 = s1.length();

        String s2 = null;
        Integer i2 = (s2 != null ? s2.length() : null);

        Integer i3 = (('a' + 'b') != null ? ('a' + 'b').length() : null);
    }
}

Usage

Use nullable variables in method invocations or field accesses.

Try not using nest nullable variables as this will increase complexity.

Contribute on Github! Edit this section.