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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){
if(n>=N){
N+=2;
Object[] temps=datas;
datas=new Object[N];
for(int i=0;i<temps.length;i++){
datas[i]=temps[i];
}
}
datas[n++]=data;
}

public Object peek(){
return datas[n-1];
}
public Object pop(){
if(--n>=0){
return datas[n];
}
return 0;
}


public static void main(String[] args){
Stack stack=new Stack();
stack.push("aa");
stack.push("bb");
stack.push("cc");

System.out.println(stack.pop());
System.out.println(stack.pop());
System.out.println(stack.pop());
System.out.println(stack.pop());
}
}


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package com.deng.oracle;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class TestOracle {
public static void main(String[] args) {
try {
Class.forName("oracle.jdbc.driver.OracleDriv ......

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java -verbose:gc TestStaticGc
// TestStaticGc.java
public class TestStaticGc {
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package com.yz.mylink;
public class Student {
private Integer id;
private String name;
private Integer age;
private String classes;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = i ......

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