Java는 버블 정렬 알고리즘을 구현합니다.

```
bubbleSort(array)
  	for i <- 1 to indexOfLastUnsortedElement-1
	    if leftElement > rightElement
	      swap leftElement and rightElement
end bubbleSort
```

// Bubble sort in Java

import java.util.Arrays;

class BubbleSort {
  void bubbleSort(int array[]) {
    int size = array.length;
    for (int i = 0; i < size - 1; i++)
      for (int j = 0; j < size - i - 1; j++)
        // To sort in descending order, change > to < in this line.
        if (array[j] > array[j + 1]) {
          int temp = array[j];
          array[j] = array[j + 1];
          array[j + 1] = temp;
        }
  }
  public static void main(String args[]) {
    int[] data = { -2, 45, 0, 11, -9 };
    BubbleSort bs = new BubbleSort();
    bs.bubbleSort(data);
    System.out.println("Sorted Array in Ascending Order:");
    System.out.println(Arrays.toString(data));
  }
}