Java AbstractSequentialList conatinsAll()方法及示例

Java AbstractSequentialList的containAll()方法是用来检查两个集合是否包含相同的元素。它以一个集合为参数，如果这个集合的所有元素都存在于另一个集合中，则返回True。

语法

public boolean containsAll(Collection C)

参数： 参数C是一个集合。这个参数指的是需要在这个集合中检查其元素出现的集合。

返回值： 如果这个集合包含其他集合的所有元素，该方法返回True，否则返回False。

以下程序说明了AbstractSequentialList.conatinsAll()方法。

程序1 :

// Java code to illustrate
// AbstractSequentialList containsAll()
  
import java.util.*;
  
class AbstractSequentialListDemo {
    public static void main(String args[])
    {
  
        // Creating an empty Collection
        AbstractSequentialList<String>
            abs = new LinkedList<String>();
  
        // Use add() method to
        // add elements in the collection
        abs.add("Geeks");
        abs.add("for");
        abs.add("Geeks");
        abs.add("10");
        abs.add("20");
  
        // prints the list
        System.out.println("AbstractSequentialList 1: "
                           + abs);
  
        // Creating another empty Collection
        AbstractSequentialList<String>
            abs2 = new LinkedList<String>();
  
        // Use add() method to
        // add elements in the collection
        abs2.add("Geeks");
        abs2.add("for");
        abs2.add("Geeks");
        abs2.add("10");
        abs2.add("20");
  
        // prints the list
        System.out.println("AbstractSequentialList 2: "
                           + abs2);
  
        // Check if the collection
        // contains same elements
        System.out.println("\nBoth the collections same: "
                           + abs.containsAll(abs2));
    }
}

输出。

AbstractSequentialList 1: [Geeks, for, Geeks, 10, 20]
AbstractSequentialList 2: [Geeks, for, Geeks, 10, 20]

Both the collections same: true

程序 2:

// Java code to illustrate boolean containsAll()
  
import java.util.*;
  
class AbstractSequentialListDemo {
    public static void main(String args[])
    {
  
        // Creating an empty Collection
        AbstractSequentialList<String>
            abs = new LinkedList<String>();
  
        // Use add() method to
        // add elements in the collection
        abs.add("Geeks");
        abs.add("for");
        abs.add("Geeks");
  
        // prints the list
        System.out.println("AbstractSequentialList 1: "
                           + abs);
  
        // Creating another empty Collection
        AbstractSequentialList<String>
            abs2 = new LinkedList<String>();
  
        // Use add() method to
        // add elements in the collection
        abs2.add("10");
        abs2.add("20");
  
        // prints the list
        System.out.println("AbstractSequentialList 2: "
                           + abs2);
  
        // Check if the collection
        // contains same elements
        System.out.println("\nAre both collections same: "
                           + abs.containsAll(abs2));
    }
}

输出。

AbstractSequentialList 1: [Geeks, for, Geeks]
AbstractSequentialList 2: [10, 20]

Are both collections same: false