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	`1`	`+package 栈相关.q232_用栈实现队列.含有最大值的队列;`
	`2`	`+`
	`3`	`+import java.util.LinkedList;`
	`4`	`+import java.util.Queue;`
	`5`	`+`
	`6`	`+public class MaxQueue {`
	`7`	`+`
	`8`	`+ private Queue<Integer> queue;`
	`9`	`+ private LinkedList<Integer> max;`
	`10`	`+`
	`11`	`+ public MaxQueue() {`
	`12`	`+ queue = new LinkedList<>();`
	`13`	`+ max = new LinkedList<>();`
	`14`	`+ }`
	`15`	`+`
	`16`	`+ public int max_value() {`
	`17`	`+ return max.size() == 0 ? -1 : max.getFirst();`
	`18`	`+ }`
	`19`	`+`
	`20`	`+ public void push_back(int value) {`
	`21`	`+ queue.add(value);`
	`22`	`+ while (max.size() != 0 && max.getLast() < value) {`
	`23`	`+ max.removeLast();`
	`24`	`+ }`
	`25`	`+ max.add(value);`
	`26`	`+ }`
	`27`	`+`
	`28`	`+ public int pop_front() {`
	`29`	`+ if (max.size() != 0 && queue.peek().equals(max.getFirst())) {`
	`30`	`+ max.removeFirst();`
	`31`	`+ }`
	`32`	`+ return queue.size() == 0 ? -1 : queue.poll();`
	`33`	`+ }`
	`34`	`+}`

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