從數組中添加或刪除數據

Question

如何將數據添加到String []或從String []中刪除行？

//excerpt from class 
public class Images { 

public final static String[] imageUrls = new String[]{ 
    "http://192.168.1.1/pictures/card/AA001a.jpg", 
    "http://192.168.1.1/pictures/card/AA001b.jpg"}; 
} 

Answer 1

刪除項目：

public static String[] removeElements(String[] input, String deleteMe) { 
    List result = new LinkedList(); 

    for(String item : input) 
     if(!deleteMe.equals(item)) 
      result.add(item); 

    return result.toArray(input); 
} 

添加項目：

imageUrls.add("test1"); 

Answer 2

來源：http://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html

An array is a container object that holds a fixed number of values of a single type. The length of an array is established when the array is created. After creation, its length is fixed. 

相反，你可以使用一個Vector或ArrayList。

一些示例代碼：

public static void main(String[] args) 
{ 
    // Inizialize a string: 
    String path = "http://192.168.1.1/pictures/card/AA001b.jpg"; 

    // Inizialize the ArrayList: 
    ArrayList<String> s = new ArrayList<String>(); 

    //Add some values: 
    s.add("http://192.168.1.1/pictures/card/AA001a.jpg"); 
    s.add("http://192.168.1.1/pictures/card/AA001b.jpg"); 

    //Remove first element: 
    s.remove(0); 

    //Remove the second element: 
    s.remove(path); 
} 

Answer 3

嘗試列表如下：

List<String> imageUrlList = Arrays.asList(imageUrls); 
imageUrlList.add("http://localhost/webapp/mypic.jpg"); 
imageUrlList.remove("http://192.168.1.1/pictures/card/AA001b.jpg"); 

Answer 4

什麼，我建議你使用ArrayList中你可以伊斯利添加和刪除字符串和成做

Java doc ArrayList