【Java】List容器与数组的互相转换

数组转为List容器

public class App {
  public static void main(String[] args) {
    List<String> stringA = Arrays.asList("hello", "world","A");
    String[] stringArray = {"hello","world","B"};
    List<String> stringB = Arrays.asList(stringArray);
 
    System.out.println(stringA);
    System.out.println(stringB);
  }
}

List容器转数组

import java.util.ArrayList;
import java.util.List;
public class Test {  
    public static void main(String[] args) {  
        List<String> list=new ArrayList<String>();  
        list.add("a");  
        list.add("b");  
        list.add("c");  
        int size=list.size();  
        String[] array = (String[])list.toArray(new String[size]);  
        for(int i=0;i<array.length;i++){  
            System.out.println(array[i]);  
        }  
    }  
}