Package com.github.javaparser.ast.expr

Class RecordPatternExpr

java.lang.Object
com.github.javaparser.ast.Node
com.github.javaparser.ast.expr.Expression
com.github.javaparser.ast.expr.PatternExpr
com.github.javaparser.ast.expr.RecordPatternExpr
All Implemented Interfaces:
NodeWithFinalModifier<RecordPatternExpr>, NodeWithModifiers<RecordPatternExpr>, NodeWithRange<Node>, NodeWithTokenRange<Node>, NodeWithType<PatternExpr,Type>, Observable, Visitable, HasParentNode<Node>, Cloneable
public class RecordPatternExpr extends PatternExpr implements NodeWithFinalModifier<RecordPatternExpr>

Record Patterns

Record patterns were officially added in Java 21 to allow the deconstruction of record values and provide convenient access to inner fields through pattern matching.

JDK 21 Grammar

Pattern
     TypePattern
     RecordPattern

 RecordPattern:
     ReferenceType ( [PatternList] )

 PatternList
     Pattern {, Pattern }

Example

Example taken from JEP440: RecordPatterns 

  record Pair(Object x, Object y) {}

 Pair p = new Pair(42, 42);

 if (p instanceof Pair(String s, String t)) {
     System.out.println(s + ", " + t);
 } else {
     System.out.println("Not a pair of strings");
 }
See Also: