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public static boolean isEmail(String str)
{
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package com.yz.mystack;
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Node next;
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}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
public Node getNext() {
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package com.yz.mystack;
public class Stack {
Object[] datas;
Integer n=0;
Integer N=1;
public Stack(){
datas=new Object[N];
}
public void push(Object data){
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