Merge pull request #14 from CottonChou/master

Queue&Stack

group19/398129523/Queue

@@ -0,0 +1,38 @@
+package com.coding.work;
+
+import java.util.NoSuchElementException;
+
+
+
+public class Queue {
+	private Object[] elementdate;
+	private int size;
+	private int index;
+
+	public void enQueue(Object o) {
+		if(o == null){
+			throw new IllegalArgumentException();
+		}
+		elementdate[index++] = o;
+		size = index + 1;
+	}
+
+	public Object deQueue(){
+		if (size == 0) {
+			throw new NoSuchElementException();	
+		}else{
+			Object out = elementdate[0];
+			System.arraycopy(elementdate, 1, elementdate, 0, size - 1);
+			return out;
+		}
+	}
+
+	public boolean isEmpty(){
+
+		return size == 0;
+	}
+
+	public int size() {
+		return size;
+	}
+}

group19/398129523/Stack

@@ -0,0 +1,36 @@
+package com.coding.work;
+
+import java.util.NoSuchElementException;
+
+public class Stack {
+		private Object[] elementdata;
+		private int size;
+		private int index;
+
+		public void push(Object o) {
+			if (o == null) {
+				throw new IllegalArgumentException();
+
+			}
+			size = index + 1;
+			elementdata[index++] = o;
+		}
+
+		public Object pop() {
+			if (size == 0) {
+				throw new NoSuchElementException();	
+			}
+			size --;
+			return elementdata[index--];
+		}
+
+		@SuppressWarnings("unused")
+		private boolean isEmpty() {
+			return size == 0;
+		}
+
+		private int size() {
+			return size;
+		}
+
+}