Appendعملها في الكود

السلام عليكم

  import java.util.*;
  import javax.swing.*;

  public class LinearArray
  {
	 private int [] data; // array of values
	 private static Random generator = new Random();

	 // create array of given size and fill with random numbers
	public LinearArray( int size )
	 {
	   data = new int [ size ]; // create space for array

		// fill array with random ints in range 10-99
		for ( int i = 0; i < size; i++ )
		   data[ i ] = 10 + generator.nextInt( 90 );
	 } // end LinearArray constructor

	 // perform a linear search on the data  
	 public int linearSearch( int searchKey )
	 {
		// loop through array sequentially				  
		for ( int index = 0; index < data.length; index++ )
		   if ( data[ index ] == searchKey )				
			  return index; // return index of integer	  

		return -1; // integer was not found
	 } // end method linearSearch		  

	 // method to output values in array
	 public String toString()
	 {
	   StringBuffer temporary = new StringBuffer();

	    // iterate through array
		for ( int element : data )
		   temporary.append( element + " " );		temporary.append( "\n" ); // add endline character
		return temporary.toString();
	 } // end method toString

ماهي عمل الذي بلون الاحمر في الكود

الامر التالي:

// iterate through array

for ( int element : data )

temporary.append( element + " " );

temporary.append( "\n" ); // add endline character

ارجو التوضيح منكم

مشكورين وجزاكم الله خير