Apex Multiline Strings: Real-World Use Cases in Salesforce
Summary
Apex multiline strings introduced in Salesforce Summer '26 simplify building clean, readable text blocks in Apex, eliminating messy string concatenations and \n hacks. This feature uses triple single quotes to define multiline strings and supports string templates with variable placeholders, populated via a .template() method accepting a Map. It addresses key real-world challenges like building REST callout payloads with reserved word fields, composing email bodies cleanly, and writing readable dynamic SOQL queries. Developers can now write more maintainable Apex code that directly represents payloads or templates without cumbersome workarounds.
Takeaways
- Define multiline strings in Apex using triple single quotes ''' for clarity.
- Use ${variableName} placeholders with .template(Map) for dynamic string content.
- Apply multiline strings to REST payloads with Apex reserved word fields.
- Leverage multiline strings to simplify formatted email body templates in Apex.
- Write more readable long dynamic SOQL queries with multiline strings.
No more string concatenation or \n hacks — write clean, readable text blocks directly in Apex If you've ever built a REST callout payload in Apex, you know how messy it gets. A dozen concatenated strings, \n characters everywhere, and a class you had to create just to serialize JSON that had a field named currency . Summer '26 finally fixes this with multiline string templates — using the ''' token. What Are Apex Multiline Strings? According to the official Summer '26 release notes , you can now construct strings over multiple lines in Apex using triple single quotes ''' to open and close the block — similar to how you define a multiline comment with /* and */ . Summer '26 also introduces string templates — the ability to pass a Map of values to populate ${variable} placeholders inside a multiline string using the .template() method. Before vs.