Java List取交集差集

[java]

import java.util.*;

public class HelloWorld
{
// arguments are passed using the text field below this editor
public static void main(String[] args)
{
List<Long> freshClassList = new ArrayList<>();
freshClassList.add(372L);
freshClassList.add(373L);
freshClassList.add(376L);
freshClassList.add(379L);
freshClassList.add(380L);

List<Long> supContractClassList = new ArrayList<>();
supContractClassList.add(373L);
supContractClassList.add(3729L);

// System.out.println(freshClassList.removeAll(supContractClassList));//true
// System.out.println(freshClassList.size());//4

System.out.println(freshClassList.retainAll(supContractClassList));//true
System.out.println(freshClassList.size());//
}
}

[/java]

Jason.wang

When you find your talent can't afford to be ambitious, be quiet and study !

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