37.10 Other Java 9 Topics

In this section, we provide brief mentions of various other features of JSR 379. At the time of this writing during Java 9’s early access stage, only limited documentation was available to us. So we concentrated on the information from the JSRs and JEPs. In a few cases, we did not comment on certain new Java 9 features. These include:

  • JEP 193: Variable Handles (http://openjdk.java.net/jeps/193),

  • JEP 268: XML Catalogs (http://openjdk.java.net/jeps/268) and

  • JEP 274: Enhanced Method Handles (http://openjdk.java.net/jeps/274).

37.10.1 Indify String Concatenation

JEP 280, Indify String Concatenation, is a behind-the-scenes enhancement to javac that’s geared to improving String concatenation performance in the future. ...

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