Introduction to two for loops in Java

package com.zxd.test; 
import java.util.List; 
import org.hibernate.HibernateException; 
import org.hibernate.Query; 
import org.hibernate.Session; 
import org.hibernate.SessionFactory; 
import org.hibernate.cfg.Configuration; 
import com.zxd.bean.House; 
import com.zxd.util.QueryProperty; 
/** 
* HQL封闭查询的测试类 
* @author zhang 
* 
*/ 
public class TestHouse { 
public static void main(String[] args) { 
//公共的成员变量 
SessionFactory sf = null; 
Session session = null; 
QueryProperty qp = new QueryProperty(); 
//封装查询的数据 
qp.setTitle("%好房%"); 
qp.setStreet_id("1002"); 
qp.setType_id("1004"); 
qp.setLow_price(20); 
qp.setHigh_price(200); 
qp.setSmall_floorage(50); 
qp.setBig_floorage(180); 
//HQL语句 
StringBuffer sb = new StringBuffer(); 
sb.append("from House where "); 
sb.append("(title like :title) "); 
sb.append("and (type_id like :type_id) "); 
sb.append("and (street_id like :street_id) "); 
sb.append("and (price between :low_price and :high_price) "); 
sb.append("and (floorage between :small_floorage and :big_floorage)"); 
try { 
//开始执行查询 
sf = new Configuration().configure().buildSessionFactory(); 
session = sf.openSession(); 
Query query = session.createQuery(sb.toString()); 
query.setProperties(qp); 
List<House> list = query.list(); 
//第一种用：的循环 
/*for(House house:list){ 
System.out.println("标题是："+house.getTitle()); 
System.out.println("面积是："+house.getFloorage()); 
System.out.println("价格是："+house.getPrice()); 
System.out.println("区是："+house.getStreet().getDistrict().getName()); 
System.out.println("街道是："+house.getStreet().getName()); 
System.out.println("----------------------------------"); 
}*/ 
//第二种循环 
for(int i = 0;i<list.size();i++){ 
System.out.println("标题是："+list.get(i).getTitle()); 
System.out.println("面积是："+list.get(i).getFloorage()); 
System.out.println("价格是："+list.get(i).getPrice()); 
System.out.println("区是："+list.get(i).getStreet().getDistrict().getName()); 
System.out.println("街道是："+list.get(i).getStreet().getName()); 
System.out.println("----------------------------------"); 
} 
} catch (HibernateException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
}finally{ 
session.close(); 
sf.close(); 
} 
} 
}

The first type of loop in the above example is something I didn't remember. It uses the key character ":". Generally, this type of loop is used to traverse a collection (List, Map) It's very convenient to use.

The second type of loop is an ordinary loop. This is the most common for loop in Java.

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