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class Demo{

private static object staticObjLockA = new Object();

private static object staticObjLockB = new Object();

private static object staticObjLockC = new Object();

//对象A.C.B加了锁

public void A() {

lock(staticObjLockA){

lock(staticObjLockC){

AInner();

}

}

}

//对象B.A加了锁，与A函数一起使用，可能造成死锁

public void B() {

lock(staticObjLockB){

BInner();

}

}

public void AInner(){

lock(staticObjLockB){}

}

public void BInner(){

lock(staticObjLockA){}

}

}