抽象集合移除()方法在 Java 中的示例
原文:https://www . geesforgeks . org/abstract collection-remove-method-in-Java-with-examples/
Java 抽象集合 的移除(对象 O) 方法是从集合中移除特定元素。
语法:
AbstractCollection.remove(Object O)
参数:参数 O 属于集合类型，指定要从集合中移除的元素。
返回值:如果参数中指定的元素最初出现在集合中并被成功移除，则该方法返回真，否则返回假。
下面的程序说明了 Java . util . abstract collection . remove()方法:
程序 1 :
// Java code to illustrate remove()
import java.util.*;
import java.util.AbstractCollection;
public class AbstractCollectionDemo {
public static void main(String args[])
{
// Creating an empty AbstractCollection
AbstractCollection<String>
abs = new TreeSet<String>();
// Use add() method to add
// elements into the Collection
abs.add("Welcome");
abs.add("To");
abs.add("Geeks");
abs.add("4");
abs.add("Geeks");
abs.add("TreeSet");
// Displaying the Collection
System.out.println("Collection: " + abs);
// Removing elements using remove() method
abs.remove("Geeks");
abs.remove("4");
abs.remove("TreeSet");
// Displaying the Collection after removal
System.out.println("New Collection: " + abs);
}
}
Output:
Collection: [4, Geeks, To, TreeSet, Welcome]
New Collection: [To, Welcome]
程序 2:
// Java code to illustrate remove()
import java.util.*;
import java.util.AbstractCollection;
public class AbstractCollectionDemo {
public static void main(String args[])
{
// Creating an empty AbstractCollection
AbstractCollection<String>
abs = new LinkedList<String>();
// Use add() method to add
// elements into the Collection
abs.add("Welcome");
abs.add("To");
abs.add("Geeks");
abs.add("4");
abs.add("Geeks");
abs.add("LinkedList");
// Displaying the Collection
System.out.println("Collection: " + abs);
// Removing elements using remove() method
abs.remove("Geeks");
abs.remove("4");
abs.remove("LinkedList");
// Displaying the Collection after removal
System.out.println("New Collection: " + abs);
}
}
Output:
Collection: [Welcome, To, Geeks, 4, Geeks, LinkedList]
New Collection: [Welcome, To, Geeks]
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