Java ListIterator remove() 方法

2025 年 3 月 22 日 | 阅读需 2 分钟

ListIterator 接口的 remove() 方法用于从列表中移除由 next() 或 previous() 方法返回的最后一个元素。只有在没有调用过 add(E) 方法的情况下，才能调用上述方法。

语法

参数

不适用

指定者

在接口 Iterator<E> 中的 remove

不适用

抛出

UnsupportedOperationException - 如果此列表迭代器不支持给定的 remove 操作。

IllegalStateException - 如果 next() 或 previous() 方法都未被调用。

示例 1

import java.util.ArrayList;
import java.util.ListIterator;
public class JavaListIteratorremoveExample1 {
    public static void main(String[] args) {
    	ArrayList < String > vehicles = new ArrayList < String > (); 	 
    	vehicles.add("Car");
    	vehicles.add("Truck");
    	vehicles.add("Bike");
    	vehicles.add("Cycle");
    	System.out.println("The list for the vehicles is given as :"+vehicles);
        ListIterator < String > listIterator = vehicles.listIterator();
        System.out.println("Before remove() method is called. : " + vehicles);
        listIterator.next();
        listIterator.next();
        listIterator.remove();
        System.out.println("After remove() method is called.: " + vehicles);
    }
}

输出

The list for the vehicles is given as :[Car, Truck, Bike, Cycle]
Before remove() method is called. : [Car, Truck, Bike, Cycle]
After remove() method is called.: [Car, Bike, Cycle]

示例 2

import java.util.ArrayList;
import java.util.ListIterator;
public class JavaListIteratorremoveExample2 {
     public static void main(String[] args) {
    	 ArrayList < Float > marks = new ArrayList < Float > (); 	 
    	 marks.add(55f);
    	 marks.add(69f);
    	 marks.add(78f);
    	 marks.add(89f);
     	System.out.println("The list for the marks is given as :"+marks);
         ListIterator < Float > listIterator = marks.listIterator();
         System.out.println("Before remove() method is called. : " + marks);
         listIterator.next();
         listIterator.next();
         listIterator.remove();
         System.out.println("After remove() method is called.: " + marks);	 
	}	
}

输出

The list for the marks is given as :[55.0, 69.0, 78.0, 89.0]
Before remove() method is called. : [55.0, 69.0, 78.0, 89.0]
After remove() method is called.: [55.0, 78.0, 89.0]

示例 3

import java.util.ArrayList;
import java.util.ListIterator;
public class JavaListIteratorremoveExample3 {
   public static void main(String[] args) {
	   ArrayList < Integer > marks = new ArrayList < Integer > (); 	 
  	     marks.add(25);
  	     marks.add(30);
  	     marks.add(35);
  	     marks.add(40);
  	     marks.add(45);
   	System.out.println("The list for the ages is given as :"+marks);
        ListIterator < Integer > listIterator = marks.listIterator();
        System.out.println("Before remove() method is called. : " + marks);
        listIterator.next();
        listIterator.next();
        listIterator.remove();
        listIterator.next();
       System.out.println("After remove() method is called.: " + marks);	 
	}	
}

输出

The list for the ages is given as :[25, 30, 35, 40, 45]
Before remove() method is called. : [25, 30, 35, 40, 45]
After remove() method is called.: [25, 35, 40, 45]

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Java ListIterator remove() 方法

语法

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示例 1

示例 2

示例 3

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Java ListIterator remove() 方法

语法

参数

指定者

返回

抛出

示例 1

示例 2

示例 3

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