# Use Text Block
# Description
Java 15 introduced Text Blocks (opens new window) to express String literals spanning several lines and significantly reduce the need for escape sequences.
This rule replaces multiline String concatenation expressions with Text Block String literals. Thus, removing some boilerplate code and increasing the readability of String expressions.
Requirements
- Java 15
# Benefits
Reduces the need for escape sequences. Improves readability.
# Tags
# Code Changes
# Concatenation of HTML Code
Pre
String html = "" +
"<html>\n" +
"\t<head>\n" +
"\t\t<meta charset=\"utf-8\">" +
"\t</head>\n" +
"\t<body class=\"default-view\" style=\"word-wrap: break-word;\">\n"+
"\t\t<p>Hello, world</p>\n" +
"\t</body>\n"+
"</html>\n";
Post
String html = """
<html>
<head>
<meta charset="utf-8">
</head>
<body class="default-view" style="word-wrap: break-word;">
<p>Hello, world</p>
</body>
</html>
""";
# Java Code without Missing Line Break at End
Pre
String java = "" +
" ArrayList<String> list = new ArrayList<>();\n" +
" list.add(\"one\");\n" +
" list.add(\"two\");\n" +
" list.add(\"three\");";
Post
String java = """
ArrayList<String> list = new ArrayList<>();
list.add("one");
list.add("two");
list.add("three");\
""";
# Concatenation with Integer Literals
Pre
String java = "" +
" int[] intArray = new int[3];\n" +
" intArray[" + 0 + "] = " + 10 + ";\n" +
" intArray[" + 1 + "] = " + 20 + ";\n" +
" intArray[" + 2 + "] = " + 30 + ";\n";
Post
String java = """
int[] intArray = new int[3];
intArray[0] = 10;
intArray[1] = 20;
intArray[2] = 30;
""";
Use a Java Refactoring Tool
No license required
You can review this refactoring on your code without a license by installing jSparrow to your Eclipse IDE. Install the plug-in from Eclipse IDE: Eclipse Marketplace.
System-wide Refactoring
Do you want to automate this refactoring (and many more) to your system-wide code? The automatic application of this system-wide refactoring can be unlocked by acquiring your jSparrow license.
