java程序中foreach用法示例

for (Object objectname : preArrayList(一个Object对象的列表)) {}

package com.kuaff.jdk5;
import java.util.*;

 

import java.util.Collection;

public class Foreach
{
private Collection c = null;

private String[] belle = new String[4];

public Foreach()
{
belle[0] = "西施";
belle[1] = "王昭君";
belle[2] = "貂禅";
belle[3] = "杨贵妃";
   c = Arrays.asList(belle);
}

public void testCollection()
{
for (String b : c)
{
 System.out.println("曾经的风化绝代:" + b);
}
}

public void testArray()
{
for (String b : belle)
{
  System.out.println("曾经的青史留名:" + b);
}
}

public static void main(String[] args)

{
Foreach each = new Foreach();
   each.testCollection();
each.testArray();
}
}

for (int i = 0; i < belle.length; i++)
{
String b = belle[i];
System.out.println("曾经的风化绝代:" + b);
}

for (String b : belle)
{
   System.out.println("曾经的青史留名:" + b);
 }

for (Iterator it = c.iterator(); it.hasNext();)
{
String name = (String) it.next();
System.out.println("曾经的风化绝代:" + name);
}

for (String b : c)
{
System.out.println("曾经的风化绝代:" + b);
}

for (Iterator it = c.iterator(); it.hasNext();)
{
   itremove()
}