最差适应算法原理及java代码

最差适应算法（Worst Fit Algorithm）是一种内存分配算法，其原理是在分配内存时，选择剩余空间最大的块进行分配。这种算法的优点是可以避免出现过多的小碎片，但是会导致剩余空间较小的块无法被利用。

以下是最差适应算法的Java代码实现：

public class WorstFit {
    public static void main(String[] args) {
        int[] blockSize = {100, 500, 200, 300, 600};
        int[] processSize = {212, 417, 112, 426};
        worstFit(blockSize, processSize);
    }

    public static void worstFit(int[] blockSize, int[] processSize) {
        int[] allocation = new int[processSize.length];
        Arrays.fill(allocation, -1);

        for (int i = 0; i < processSize.length; i++) {
            int worstIndex = -1;
            for (int j = 0; j < blockSize.length; j++) {
                if (blockSize[j] >= processSize[i]) {
                    if (worstIndex == -1 || blockSize[j] > blockSize[worstIndex]) {
                        worstIndex = j;
                    }
                }
            }
            if (worstIndex != -1) {
                allocation[i] = worstIndex;
                blockSize[worstIndex] -= processSize[i];
            }
        }

        System.out.println("Process No.\tProcess Size\tBlock no.");
        for (int i = 0; i < processSize.length; i++) {
            System.out.print(" " + (i+1) + "\t\t" + processSize[i] + "\t\t");
            if (allocation[i] != -1) {
                System.out.print(allocation[i] + 1);
            } else {
                System.out.print("Not Allocated");
            }
            System.out.println();
        }
    }
}