Javascript array loop example code for loop array in javascript

You can loop data in javascript array by using index and limit with array.length for example code in below

 <script>  
    // Create array of String  
    arrayObj=["CAT","DOG","MAN","CAR"];  
    for (var i=0;i<arrayObj.length;i++)  
      document.write(arrayObj[i] + "<br>");  
    }  
 </script>  

The out put is

CAT

DOG

MAN

CAR

File in Java how to Read and Write File in Java

You can use class in package java.io.* to manage file with java
for example below

Example code for read file line by line with Java

  FileInputStream fs = new FileInputStream("filename.txt"); 
  DataInputStream ds = new DataInputStream(fs);
  BufferedReader br = new BufferedReader(new InputStreamReader(ds));
  String tmp; 
  while ((tmp = br.readLine()) != null)   {
      System.out.println (tmp);
  } 
  ds.close();

Example code for Write file with java
  FileWriter fw = new FileWriter("file_name.txt");
  BufferedWriter out = new BufferedWriter(fw);
  out.write("Test Wrrite1");
  out.write("Test Wrrite2");
  out.write("Test Wrrite3");  
  out.close();