Modern Java Evolution

Text Blocks

Text blocks (Java 15) hold multi-line strings between """ delimiters: no escape ladders, automatic incidental-indentation stripping, and readable embedded JSON, SQL, and HTML.

Open with """ + newline; close alignment controls indentation stripping
The closing delimiter's column sets the left margin — move it to control indentation
\ at line end joins lines (no newline); \s keeps trailing spaces
Quotes inside need no escaping; \n, \t still work if wanted
It's still a String — same type, same methods, interning included

Before and after

String jsonOld = "{\n" +
        "  \"name\": \"Duke\",\n" +
        "  \"role\": \"mascot\"\n" +
        "}";

String json = """
        {
          "name": "Duke",
          "role": "mascot"
        }
        """;   // closing delimiter position strips the common indent

The indentation algorithm: the compiler finds the minimal indentation across all lines including the closing delimiter line, and strips it — so out-denting the closing """ preserves visual nesting in source while producing flush-left output. String.stripIndent(), translateEscapes(), and formatted() are the companion methods; """…%s…""".formatted(value) covers interpolation until/unless a dedicated feature lands.