队列OJ题（三）

importjava.util.Stack;
/*** Created with IntelliJ IDEA.* Description:* User: Snk* Date: 2023-02-07* Time: 12:50*/classMyQueue {
privateStack<Integer>stack1;
privateStack<Integer>stack2;
publicMyQueue() {
this.stack1=newStack<>();
this.stack2=newStack<>();
    }
publicvoidpush(intx) {
stack1.push(x);
    }
publicintpop() {
if(empty()){
return-1;
        }
if (stack2.isEmpty()) {
while (!stack1.isEmpty()) {
stack2.push(stack1.pop());
            }
        }
returnstack2.pop();
    }
publicintpeek() {
if(empty()){
return-1;
        }
if (stack2.isEmpty()) {
while (!stack1.isEmpty()) {
stack2.push(stack1.pop());
            }
        }
returnstack2.peek();
    }
publicbooleanempty() {
returnstack1.isEmpty() &&stack2.isEmpty();
    }
}