SuppressWarnings "all" complaint from Eclipse

H2ONaCl picture H2ONaCl · Jan 14, 2012 · Viewed 12k times · Source

What is wrong with the SuppressWarnings annotation above the if statement? Eclipse with Sun JDK 6 provides two syntax error descriptions, both unhelpful and hard to understand, shown in comments.

class TestDeadCode
{
    //@SuppressWarnings("all")
    public static void main(String[] args)
    {
        @SuppressWarnings("all")  // syntax errors: insert enum body, insert enum id
        if ((Constants.flag0) && (Constants.flag1))
            System.out.println("hello\n");      
    }
}

interface Constants
{
    boolean flag0 = false;
    boolean flag1 = false;
}

Answer

JustinDanielson picture JustinDanielson · Jan 14, 2012

Only classes, methods, variable declarations, parameters and packages may be annotated. Therefore, you cannot use SuppressWarnings("all") on an if statement.

To fix this issue, you can simply do the following.

@SuppressWarnings("all")
boolean flag = Constants.flag0 && Constants.flag1;
if (flag) {
    System.out.println("hello\n");
}

There is no SuppressWarnings("Dead code") as of yet.

http://docs.oracle.com/javase/7/docs/api/java/lang/SuppressWarnings.html http://pmd.sourceforge.net/suppressing.html