Java SE 14

2020. 3. 17 Released.

• JEP 305: instnaceof를 위한 패턴 매칭 (Preview)
• JEP 343: Packaging Tool (Incubator)
• JEP 345: NUMA-Aware Memory Allocation for G1
• JEP 349: JFR Event Streaming
• JEP 352: Non-Volatile Mapped Byte Buffers
• JEP 358: Helpful NullPointerExceptions
• JEP 359: Records (Preview)
• JEP 361: switch 표현 (Standard)
• JEP 362: Solaris and SPARC Ports deprecated
• JEP 363: Concurrent Mark Sweep (CMS) Garbage Collector
• JEP 364: ZGC on macOS
• JEP 365: ZGC on Windows
• JEP 366: ParallelScavenge + SerialOld GC Combination deprecated
• JEP 367: Pack200 Tools and API
• JEP 368: Text Blocks (Second Preview)
• JEP 370: Foreign-Memory Access API (Incubator)

JEP 305

if (obj instanceof String) {
    String s = (String)obj;
    System.out.println(s.length());
}
 
if (obj instanceof String s) {
    System.out.println(s.length());
}

JEP 359

record Point(int x, int y) { }
Point p = new Point(3, 4);
System.out.println(p.x());

• JEP 305: *Pattern Matching for instanceof* (Preview)

if (obj instanceof String) {
  String s = (String) obj;
  System.out.println(s.length());
}
 
if (obj instanceof String s) {
  System.out.println(s.lenght9));
}

• JEP 343: Packaging Tool (incubator)
• JEP 345: NUMA-Aware Memory Allocation for G1
• JEP 349: JFR Event Streaming
• JEP 352: Non-Volatile Mapped Byte Buffers
• JEP 358: Helpful NullPointerExceptions
• JEP 359: *Records* (Preview)
  • `record` data class (like. tuple)

record Point (int x, int y) {} // data object
Point p = new Point(3, 4);
System.out.println(p.x());
 
public record Range(int lo, int hi) {
  public Range(int lo, int hi) {
    if (lo > hi)
      throw new IllegalArgumentException(String.format("%d, %d", lo, hi));
    this.lo = lo;
    this.hi = hi;
  }
}

• JEP 361: Switch Expressions (Standard)
• JEP 362: Deprecate the Solaris and SPARC Ports
• JEP 363: Remove the ~~Concurent Mark Sweep(CMS) Garbage Collector~~
• JEP 364: ZGC on macOS
• JEP 365: ZGC on Windows
• JEP 366: Deprecate the ParallelScavenge + SerialOld GC Combination
• JEP 367: Remove the ~~Pack200 Tools and API~~
• JEP 368: *Text Blocks* (Second Preview)
• JEP 370: Foreign-Memory Access API (Incubator)