冒泡排序 2D 数组按字母顺序 Java

Question

我能否得到第二双眼睛告诉我为什么我的数组在每次打印时都没有被排序？我正在尝试对 2 x 3 数组（ Student [][] 教室 = new Student[2][3]; ）进行排序并按姓氏字母顺序排列。我的注释代码如下：

//DECLARES THE CLASSROOM ARRAY 
  public static void sort(Student [][] array) {
      //In order for the loop to work, we must initialize values so that we can "Run" through the variables in our loop. 
      
      int a,b; //These are the variables used during loops. Type integer of positional spot needed. 
     
     
      //We will create a temporary Student called "temporary" 
      //This will host values when and if the "swap" occurs. 
      Student temporary = new Student();
      //The four loop initializing values; such as a, b will loop throughout each value of the area. 
      
      //The first two elements check the elements of the array. 
      //The last two loops run through the entirety of the array to run a compare check. 
      for (a = 0 ; a < 2 ; a++){
          
          for(b = 0 ; b < 3; b++) {
            if (b == 2 && a != 1) {
 
                if((array[a][b].getLastName().compareToIgnoreCase(array[a+1][0].getLastName()) > 0))
                temporary = array[a][b];
                array[a][b] = array[a+1][0];
                array[a+1][0] = temporary;
            }
            else if (b < 2) 
            {if((array[a][b].getLastName().compareToIgnoreCase(array[a][b+1].getLastName()) > 0)) 
                temporary = array[a][b];
                array[a][b] = array[a][b+1];
                array[a][b+1] = temporary;
            }
                
          }
          }//End-For B Loop
      }//End-For A Loop
  //End-Method Check
  

Answer 1

看看你的代码格式！始终使用 {}。 如果您不使用弯括号，则只有下一行取决于 if。所以你的代码说：

  if((array[a][b].getLastName().compareToIgnoreCase(array[a+1][0].getLastName()) > 0)){
      temporary = array[a][b];
  }
  array[a][b] = array[a+1][0];
  array[a+1][0] = temporary;

你可能想要什么：

  if((array[a][b].getLastName().compareToIgnoreCase(array[a+1][0].getLastName()) > 0)){
      temporary = array[a][b];
      array[a][b] = array[a+1][0];
      array[a+1][0] = temporary;
  }

如果你使用 Eclipse，你可以使用 CTRL + SHIFT + F 来自动格式化。