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  1. package topica.io;
  2.  
  3. import java.io.BufferedInputStream;
  4. import java.io.BufferedOutputStream;
  5. import java.io.FileInputStream;
  6. import java.io.FileOutputStream;
  7. import java.io.IOException;
  8. import java.io.ObjectInputStream;
  9. import java.io.ObjectOutputStream;
  10. import java.util.ArrayList;
  11. import java.util.Collections;
  12. import java.util.Comparator;
  13.  
  14. import topica.moduel.CanBo;
  15. import topica.moduel.GiangVien;
  16. import topica.moduel.NhanVien;
  17. import topica.moduel.Time;
  18.  
  19. public class function implements Comparator<NhanVien>  {
  20.  
  21.  
  22.  
  23. 	public static boolean addnhanvien(NhanVien nv,String path)
  24. 	{
  25. 		ArrayList<NhanVien> arr = docFile(path);
  26. 		if(arr==null)
  27. 		{
  28. 			arr = new ArrayList<>();
  29. 		}
  30. 		arr.add(nv);
  31.  
  32. 		return luuFile(arr, path);
  33.  
  34.  
  35.  
  36. 	}
  37.  
  38.  
  39. public static  boolean luuFile(ArrayList<NhanVien> arr ,String path)
  40. 	{
  41.  
  42.  
  43. 		ObjectOutputStream oos = null;
  44. 		try {
  45.  
  46. 			oos  = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(path,false)));
  47. 			oos.writeObject(arr);
  48. 			return true;
  49.  
  50. 		} catch (IOException e) {
  51. 			// TODO: handle exception
  52. 			e.printStackTrace();
  53. 		}
  54. 		finally {
  55. 			try {
  56. 				oos.close();
  57. 			} catch (IOException e) {
  58. 				// TODO Auto-generated catch block
  59. 				e.printStackTrace();
  60. 			}
  61. 		}
  62.  
  63. 		return false;
  64.  
  65. 	}
  66.  
  67.  
  68.  
  69.  
  70.  
  71.      @SuppressWarnings("unchecked")
  72. 	public static ArrayList<NhanVien> docFile(String path)
  73. 	{
  74. 		ArrayList<NhanVien> arr = new ArrayList<>();
  75. 		ObjectInputStream ois = null;
  76. 		try {
  77. 			ois = new ObjectInputStream(new BufferedInputStream(new FileInputStream(path)));
  78.  
  79. 			Object o = ois.readObject();
  80. 			 arr = (ArrayList<NhanVien>) o;
  81. 			 return arr;
  82.  
  83.  
  84.  
  85. 		} 
  86. 		catch (Exception e) {
  87. 			// TODO: handle exception
  88. 			e.printStackTrace();
  89. 		}
  90. 		finally {
  91.  
  92. 			try {
  93. 				ois.close();
  94. 			} catch (IOException e) {
  95. 				// TODO Auto-generated catch block
  96. 				e.printStackTrace();
  97. 			}
  98. 		}
  99.  
  100. 		return null;
  101.  
  102. 	}
  103.  
  104.  
  105.  
  106.  
  107. 	 public static NhanVien find(String str,String path)
  108. 	{
  109.  
  110. 		ArrayList<NhanVien> arr = docFile(path);
  111.  
  112. 		for (NhanVien nhanVien : arr) {
  113. 			if(nhanVien.getID().equals(str))
  114. 			{
  115. 				return nhanVien;
  116. 			}
  117.  
  118. 		}
  119. 		return null;
  120. 	}
  121.  
  122.  
  123.  
  124.  
  125. 	 public static  void comparato(String path)
  126. 	 {
  127. 		 ArrayList<NhanVien> arr = docFile(path);
  128. 		 Collections.sort(arr,new function());
  129. 		 System.out.println("!--------------Mảng sau khi sắp xếp-----------!");
  130. 		 for (NhanVien nhanVien : arr) {
  131. 			System.out.println(nhanVien.toString());
  132. 		}
  133.  
  134.  
  135. 	 }
  136.  
  137.  
  138.  
  139.  
  140.  
  141.  
  142.  
  143. 	@Override
  144. 	public  int compare(NhanVien o1, NhanVien o2) {
  145. 		// TODO Auto-generated method stub
  146. 		int value = o1.getName().compareTo(o2.getName());
  147. 		if(value!=0)
  148. 		{
  149. 			return value;
  150. 		}
  151. 		value = Time.compare(o1.getAge(),o2.getAge());
  152.  
  153. 		return value;
  154.  
  155. 	}
  156.  
  157.  
  158. 	public static int findID(String s ,String path)
  159. 	{
  160.  
  161. 		ArrayList<NhanVien> arr = docFile(path);
  162.  
  163. 		for (int i = 0; i < arr.size(); i++) {
  164.  
  165. 			if(arr.get(i).getID().equals(s))
  166. 			{
  167. 				return i;
  168. 			}
  169.  
  170. 		}
  171. 		return -1;
  172.  
  173.  
  174.  
  175.  
  176.  
  177. 	}
  178.  
  179.  
  180.  
  181.  
  182.  
  183.  
  184.  
  185. }
  186.  
  187.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:19: error: class function is public, should be declared in a file named function.java
public class function implements Comparator<NhanVien>  {
       ^
Main.java:14: error: package topica.moduel does not exist
import topica.moduel.CanBo;
                    ^
Main.java:15: error: package topica.moduel does not exist
import topica.moduel.GiangVien;
                    ^
Main.java:16: error: package topica.moduel does not exist
import topica.moduel.NhanVien;
                    ^
Main.java:17: error: package topica.moduel does not exist
import topica.moduel.Time;
                    ^
Main.java:19: error: cannot find symbol
public class function implements Comparator<NhanVien>  {
                                            ^
  symbol: class NhanVien
Main.java:23: error: cannot find symbol
	public static boolean addnhanvien(NhanVien nv,String path)
	                                  ^
  symbol:   class NhanVien
  location: class function
Main.java:39: error: cannot find symbol
public static  boolean luuFile(ArrayList<NhanVien> arr ,String path)
                                         ^
  symbol:   class NhanVien
  location: class function
Main.java:72: error: cannot find symbol
	public static ArrayList<NhanVien> docFile(String path)
	                        ^
  symbol:   class NhanVien
  location: class function
Main.java:107: error: cannot find symbol
	 public static NhanVien find(String str,String path)
	               ^
  symbol:   class NhanVien
  location: class function
Main.java:144: error: cannot find symbol
	public  int compare(NhanVien o1, NhanVien o2) {
	                    ^
  symbol:   class NhanVien
  location: class function
Main.java:144: error: cannot find symbol
	public  int compare(NhanVien o1, NhanVien o2) {
	                                 ^
  symbol:   class NhanVien
  location: class function
Main.java:25: error: cannot find symbol
		ArrayList<NhanVien> arr = docFile(path);
		          ^
  symbol:   class NhanVien
  location: class function
Main.java:74: error: cannot find symbol
		ArrayList<NhanVien> arr = new ArrayList<>();
		          ^
  symbol:   class NhanVien
  location: class function
Main.java:80: error: cannot find symbol
			 arr = (ArrayList<NhanVien>) o;
			                  ^
  symbol:   class NhanVien
  location: class function
Main.java:110: error: cannot find symbol
		ArrayList<NhanVien> arr = docFile(path);
		          ^
  symbol:   class NhanVien
  location: class function
Main.java:112: error: cannot find symbol
		for (NhanVien nhanVien : arr) {
		     ^
  symbol:   class NhanVien
  location: class function
Main.java:127: error: cannot find symbol
		 ArrayList<NhanVien> arr = docFile(path);
		           ^
  symbol:   class NhanVien
  location: class function
Main.java:130: error: cannot find symbol
		 for (NhanVien nhanVien : arr) {
		      ^
  symbol:   class NhanVien
  location: class function
Main.java:151: error: cannot find symbol
		value = Time.compare(o1.getAge(),o2.getAge());
		        ^
  symbol:   variable Time
  location: class function
Main.java:161: error: cannot find symbol
		ArrayList<NhanVien> arr = docFile(path);
		          ^
  symbol:   class NhanVien
  location: class function
21 errors
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Standard output is empty
https://ideone.com/4etJ17
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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