class JavaClass {
    void plusAssign(Runnable i) {
        i.run();
    }

    void minusAssign(Runnable i) {
        i.run();
    }

    void timesAssign(Runnable i) {
        i.run();
    }

    void divAssign(Runnable i) {
        i.run();
    }

    void modAssign(Runnable i) {
        i.run();
    }
}