Try the following program to see how javac often generates duplicate
constant pool entries.

class T1 {
    int x;
}

class T2 extends T1 {
    {
        int a = x
            + x + x + x + x
            + x + x + x + x
            + x + x + x + x
            + x + x + x + x
            + x + x + x + x
            ;
    }
}