Java Android Arraylist字符串到ArrayList自定义类

Question

How can I convert values here:

List<String> values = new ArrayList<String>

to :

ArrayList<Custom>

EDIT :

public class Custom {


    public Custom Parse(String input) {
        // What should I do here?
    }
}

Answer 1

You could use:

List<Custom> customList = new ArrayList<Custom>();
for (String value: values) {
   customList.add(new Custom(value));
}

Although it would be better just to add a constructor with a String argument:

class Custom {
   private final String input;

   public Custom(String input) {
      this.input = input;
   }

   // not needed but implemented for completeness    
   public static Custom parse(String input) {
      return new Custom(input);
   }
}

Answer 2

Assuming your list of Custom objects has the same size with values list. With one enhanced for-loop, set the appropriate fields of your objects like this:

int i=0;

for(String str:values)
   customList.get(i++).setSomeProperty(str);

Answer 3

您可以在此线程上使用Google Collections库找到解决方案将List <String>转换为List <Integer>（或任何扩展Number的类）