language: Java7 (sun-jdk-1.7.0_10)
date: 325 days 2 hours ago
link:
visibility: private 
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class Main {
    public static void main(String[] args) {
        int x = 2;
        int y = 2;
        switch(x) {
            case 1: break;
            case y: break;
        }
    }
}
Main.java:7: error: constant expression required
            case y: break;
                 ^
1 error