[NETBEANS-6380] Add Default hint for Swithc Pattern matching

• Type: New Feature
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: java - Hints
• Assignee: Sandeep Mishra
• Reporter: Sandeep Mishra
• Created: 11/Jan/22 10:28
• Updated: 11/Jan/22 10:28

Description

In switch pattern matching, the error "the switch statement does not cover all possible input values" is thrown in the given case :

static void error2(Object o1) {
        switch (o1) { 
            case null ->
                System.out.println("null case");   
            case Integer i && i > 0 ->
                System.out.println("2nd case");  // Positive integer cases  
            case Integer i ->
                System.out.println("3rd case" + i);           // All the remaining integers 
        }
    } 

The IDE can give a hint for the switch expression for adding a default to the switch statement/expression which will fix the error as given below :

    static void error2(Object o1) {
        switch (o1) { 
            case null ->
                System.out.println("null case");   
            case Integer i && i > 0 ->
                System.out.println("2nd case");  // Positive integer cases  
            case Integer i ->
                System.out.println("3rd case" + i);           // All the remaining integers 
            default -> throw new IllegalStateException("Unexpected value: " + o1);
        }
    }