1.我假设您要存储多个标题。
我正在使用ArrayList<String>比. Array
创建一个 ArrayList 并存储所有标题值:
ArrayList<String> titleArr = new ArrayList<String>();
for (int i = 0; i < jArray3.length(); i++) {
    news_id = Integer.parseInt((json_data.getString("news_id")));
    news_title = json_data.getString("news_title");
    titleArr.add(news_title);
}
2.现在将其发送到 another class,您需要在单行中显示所有标题。
new AnotherClass().alistToString(titleArr);  
// This line should be after the for-loop
// alistToString() is a method in another class          
3.另一种类结构。
 public class AnotherClass{
      //.................. Your code...........
       StringBuilder sb = new StringBuilder();
       String titleStr = new String();
    public void alistToString(ArrayList<String> arr){
    for (String s : arr){
     sb.append(s+"\n");   // Appending each value to StrinBuilder with a space.
          }
    titleStr = sb.toString();  // Now here you have the TITLE STRING....ENJOY !!
      }
    //.................. Your code.............
   }