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class A { private int value; public A(int initialValue) { this.value = initialValue; } public void increment() { value++; } public void decrement() { value--; } public int getValue() { return value; } public static void main(String[] args) { A resource = new A(0); Thread incrementThread = new Thread(() -> { for (int i = 0; i < 5; i++) { resource.increment(); System.out.println("Incremented: " + resource.getValue()); } }); Thread decrementThread = new Thread(() -> { for (int i = 0; i < 5; i++) { resource.decrement(); System.out.println("Decremented: " + resource.getValue()); } }); incrementThread.start(); decrementThread.start(); try { incrementThread.join(); decrementThread.join(); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println("Final value: " + resource.getValue()); } }