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MergeSortedArray.java

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package Algorithms.array;

public class MergeSortedArray {

public void merge(int A[], int m, int B[], int n) {

int cur = m + n - 1;

// 指向A的尾部

int pA = m - 1;

// 指向B的尾部

int pB = n - 1;

while (cur >= 0) {

if (pA < 0 || pB < 0) {

break;

}

// 从尾部往前比较

if (A[pA] > B[pB]) {

A[cur] = A[pA--];

} else {

A[cur] = B[pB--];

}

cur--;

}

// copy the left over elements in B to A.

System.arraycopy(B, 0, A, 0, pB + 1);

return;

}

}