test/langtools/tools/javac/rawDiags/Warning.java

/*
 * @test  /nodynamiccopyright/
 * @bug 6177732
 * @summary add hidden option to have compiler generate diagnostics in more machine-readable form
 * @compile/ref=Warning.out -XDrawDiagnostics -Xlint:unchecked Warning.java
 */

import java.util.HashSet;
import java.util.Set;

class Warning
{
    static void useUnchecked() {
        Set s = new HashSet<String>();
        s.add("abc");
    }
}