如何将职员编号添加到我的打印报表中？

Question

import java.util.*;  
import java.util.Arrays;
public class EmployeeWeeklyHours{    

      public static void main(String[] args) {    

               int[][] employeeHours= new int[][] {      
                   { 2, 4, 3, 4, 5, 8, 8},      
                   { 7, 3, 4, 3, 3, 4, 4},      
                   { 3, 3, 4, 3, 3, 2, 2},      
                   { 9, 3, 4, 7, 3, 4, 1},      
                   { 3, 5, 4, 3, 6, 3, 8},      
                   { 3, 4, 4, 6, 3, 4, 4},      
                   { 3, 7, 4, 8, 3, 8, 4},      
                   { 6, 3, 5, 9, 2, 7, 9}};  

               int [] finalHours = new int[8];  

               for (int i = 0; i < finalHours.length; i++) {   
                   int total = 0;  
                   for (int j = 0; j < finalHours.length - 1; j++) {  
                       total += employeeHours[i][j];  
                       finalHours[i] = total;  
                   }
               }

               java.util.Arrays.sort(finalHours);

               int[] sort = new int[finalHours.length];

               for (int i = 0; i < finalHours.length; i++) 
                   sort[i] = finalHours[i];        
               for (int i = 7; i > -1; i--) 
                   System.out.println(sort[i]);
      }
}

员工0: 2 4 3 4 5 8 8

员工1: 7 3 4 3 3 4 4

员工2: 3 3 4 3 3 2 2

员工3: 9 3 4 7 3 4 1

员工4: 3 5 4 3 6 3 8

员工5: 3 4 4 6 3 4 4

员工6: 3 7 4 8 3 8 4

员工7: 6 3 5 9 2 7 9

正如您从我的代码中看到的，我应该按降序列出每个员工的总工作时数。然而，我似乎很难找到一种方法来显示员工总工时旁边的数字。

例如。“7号员工工作了42个小时。

有没有什么方法可以将员工编号与排序后的编号一起列出，而无需对其进行硬编码？我觉得我的问题有一个简单的答案，但现在脑海中什么都没有。

Answer 1

一种解决方案是使用TreeMap，因为它会自动对键进行排序。

TreeMap<Integer, Integer> treeMap = 
              new TreeMap<Integer, Integer>(Collections.reverseOrder());
for (int i = 0; i < finalHours.length; i++) {
    treeMap.put(finalHours[i], i);
}

for (Entry<Integer, Integer> entry : treeMap.entrySet()) {
    System.out.println( "Employee " + entry.getValue() + " worked " + entry.getKey() + " hours.");
}

Answer 2

for (int i=0; i < finalHours.length; i++) {
    System.out.println(String.format("Employee %d worked %d hours.", i, finalHours[i]));
}

既然你提到了硬编码，当你写一个循环时，不要在里面放一个神奇的"7“，而是使用像finalHours.length或employeeHours.length这样的变量。同样的原则在一般情况下也适用:即使你“知道”值是什么，也要引用变量。

Answer 3

如果你想要这段代码？

import java.util.*;  
import java.util.Arrays;
public class EmployeeWeeklyHours{    

      public static void main(String[] args) {    

               int[][] employeeHours= new int[][]{      
               { 2, 4, 3, 4, 5, 8, 8},      
               { 7, 3, 4, 3, 3, 4, 4},      
               { 3, 3, 4, 3, 3, 2, 2},      
               { 9, 3, 4, 7, 3, 4, 1},      
               { 3, 5, 4, 3, 6, 3, 8},      
               { 3, 4, 4, 6, 3, 4, 4},      
               { 3, 7, 4, 8, 3, 8, 4},      
               { 6, 3, 5, 9, 2, 7, 9}};  

               String [] finalHours = new String[8];  

               for (int i = 0; i < finalHours.length; i++) 
               {   
                   int total = 0;  
                   for (int j = 0; j < finalHours.length-1; j++) 
                   {  

                       total += employeeHours[i][j];  
                       finalHours[i] = "Employee "+ i+" worked "+total + "hours";
                   }

               }

               java.util.Arrays.sort(finalHours);

               String[] sort = new String[finalHours.length];
               for (int i = 0; i < finalHours.length; i++) 
               {  
                   sort[i] = finalHours[i];  
               }

               for (int i = 7; i > -1; i--) 
               { 
                   System.out.println(sort[i]);
               }

      }
}

结果是

Employee 7 worked 41hours
Employee 6 worked 37hours
Employee 5 worked 28hours
Employee 4 worked 32hours
Employee 3 worked 31hours
Employee 2 worked 20hours
Employee 1 worked 28hours
Employee 0 worked 34hours

使用int[]替代String[]，这样您就可以获得该结果。再见。