Text blocks (Java 15) — indentation, escaping, and JSON/SQL use cases?

Text blocks

Text blocks (""" ... """) embed multi-line strings with readable indentation. The compiler strips incidental indentation based on the closing delimiter position.

• Escape sequences still work; trailing whitespace on lines can be trimmed with \.
• Great for SQL, JSON fixtures, and OpenAPI snippets in tests.
• .formatted() or String.format for interpolation.
• Don't use for large prod SQL without parameterization—still inject via PreparedStatement.

String sql = """
        SELECT id, name
        FROM users
        WHERE tenant_id = ?
        """;
PreparedStatement ps = conn.prepareStatement(sql);