ArrayList排序加跌代器遍例
用ArrayList添加 "b " "c " "a " "d " "f " "e " .对ArrayList排序然后用Iterator遍例打印输出. 我怎么排好序一遍例排序就没了.谁能给写个详细的例子啊?
[解决办法]
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
public class Test {
public void printArrayList()
{
ArrayList list = new ArrayList();
list.add( "c " );
list.add( "b " );
list.add( "a " );
list.add( "f " );
list.add( "e " );
list.add( "d " );
Collections.sort( list, new MyComp() );
Iterator it = list.iterator();
while( it.hasNext() )
System.out.println( (String)it.next() );
}
public static void main(String[] args)
{
new Test().printArrayList();
}
private class MyComp implements Comparator
{
public int compare(Object o1, Object o2)
{
return o1.toString().compareTo( o2 );
}
}
}
