Package com.github.javaparser.ast.stmt

Class SwitchStmt

  • All Implemented Interfaces:
    NodeWithRange<Node>, NodeWithTokenRange<Node>, SwitchNode, Observable, Visitable, HasParentNode<Node>, Cloneable
    public final class SwitchStmt
extends Statement
implements SwitchNode

    The switch statement

    Java 1.0-1.4

    The basic C-like switch statement. It can switch only on integers.
    switch(x) { case 5: case 6: a=100; break; case 9: a=33; break; default: throw new IllegalStateException(); };
    In switch(a) { ... } the selector is "a", and the contents of the { ... } are the entries.

    Java 5-6

    Switching can now also be done on enum constants.

    Java 7-11

    Switching can now also be done on strings.

    Java 12-

    In preparation for pattern matching, lots of changes are made:
    • multiple labels per case
    • a -> syntax that does not fall through.
    • break can take any expression (usable in the SwitchExpr)
    • switch can be used as an expression (it becomes a SwitchExpr)
    switch(x) { case BANANA,PEAR: b=10; break; default: b=5; };
    switch(x) { case 5,6 -> println("uhuh"); default -> println("nope"); };
    Author:
    Julio Vilmar Gesser
    See Also:
    SwitchEntryStmt, SwitchExpr, SwitchNode