1. import java.util.*;
  2. import java.io.*;
  3.  
  4. class DuplicateEntryException extends Exception {
  5. 	String detail;
  6. 	DuplicateEntryException(String a)
  7. 	{
  8. 		detail = a;
  9. 	}
  10.  
  11. 	public String toString()
  12. 	{
  13. 		return "User Defined Exception : "+detail;
  14. 	}
  15. }
  16.  
  17. class a1 {
  18.  
  19. 	static LinkedList l1;
  20. 	private	static emp_struct input() throws IOException
  21. 	{
  22. 		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  23. 		emp_struct obj = new emp_struct();
  24. 		obj.emp_id = br.readLine();
  25. 		obj.name =  br.readLine();
  26. 		obj.salary = Double.parseDouble(br.readLine());
  27. 		obj.dept = br.readLine();
  28. 		try{
  29. 			System.out.println("In try block");
  30. //			l1.addFirst(obj);
  31. 			search(obj);
  32. 			l1.addFirst(obj);
  33. 		}catch(DuplicateEntryException e){
  34. 			System.out.println(e);
  35. 			obj = input();
  36. 		}
  37. 		return obj;
  38.  
  39. 	}
  40.  
  41. 	static boolean search(emp_struct obj) throws DuplicateEntryException
  42. 	{
  43.  
  44. 		System.out.println(l1);
  45. 		int begIndex = 0;
  46. 		for(begIndex =0;begIndex<l1.size();begIndex++)
  47. 		{
  48. 			emp_struct chkCase = (emp_struct)l1.get(begIndex);
  49. 			String chk = chkCase.getEmpID();
  50. 			System.out.println(chk +"&" +obj.emp_id);
  51. 			if(chk.equals(obj.emp_id));
  52. 				throw new DuplicateEntryException("Duplicate entry found");
  53.  
  54. 		}			
  55. 		return true;
  56. 	}
  57. 	public static void main(String args[]) throws IOException
  58. 	{
  59. 		l1 = new LinkedList();
  60. 		emp_struct obj;
  61. 		int i=0;
  62. 		for(i=0;i<10;i++)
  63. 		{
  64. 			obj = input();
  65.  
  66. 		}
  67.  
  68.  
  69. 	}
  70. }
  71.  
  72.  
  73. class emp_struct {
  74. 	public String emp_id;
  75. 	public String name;
  76. 	public double salary;
  77. 	public String dept;
  78.  
  79. 	public String getEmpID()
  80. 	{
  81. 		return emp_id;
  82. 	}
  83.  
  84. 	public String toString()
  85. 	{
  86. 		return emp_id+"\t"+name+"\t"+salary+"\t"+dept;
  87. 	}
  88. }
  89.