优化了字节码文件内文本块的编译
jdk11

public static void main(String[] args) {
        System.out.println("{\n" +
                           "    \"name\":\"java\",\n" +
                           "    \"age\":23,\n" +
                           "    \"address\":\"嘿嘿嘿\"\n" +
                           "}");
}

jdk17

public static void main(String[] args) {
        String text = """
                    {
                       "name":"java",
                       "age":23,
                       "address":"嘿嘿嘿"
                    }
                """;
        System.out.println(text);
}