Java 12+ features support

[alisevych]

Description

Support new Java features introduced in Java 12+

Expected behavior

Process them correctly, analyze and generate tests for them.

Environment

JDK 12+ IntelliJ IDEA 2022.2+ with JRE 17+

List of features

• [ ] Strings New Methods:

Java 12:

• indent(int n)
• transform(Function f)
• Optional describeConstable()
• String resolveConstantDesc​(MethodHandles.Lookup lookup)

Java 13-15:

• Text Blocks and new methods in String class

• [ ] Switch statements: new features in Java 12, 13, 14, 17
• [ ] File.mismatch method
• [ ] Compact Number Formatting
• [ ] Teeing Collectors
• [ ] java.lang.constant
• [ ] Pattern Matching for instanceof

... to be continued