import java.util.Arrays;
publicclass mergingSort {
inta[]={,56,17,18,23,34,15,34,12,64,5,4,62,99,98,54};
publicmergingSort(){
sort(a,0,a.length-1);
for(int i=0;i<a.length;i++)
System.out.println(a[i]);
}
publicvoid sort(int[] data, int left, int right) {
// TODO Auto-generatedmethod stub
if(left<right){
//找出中间索引
int center=(left+right)/2;
//对左边数组进行递归
sort(data,left,center);
//对右边数组进行递归
sort(data,center+1,right);
//合并
merge(data,left,center,right);
}
}
publicvoid merge(int[] data, int left, int center, int right) {
// TODO Auto-generatedmethod stub
int [] tmpArr=newint[data.length];
int mid=center+1;
//third记录中间数组的索引
int third=left;
int tmp=left;
while(left<=center&&mid<=right){
//从两个数组中取出最小的放入中间数组
if(data[left]<=data[mid]){
tmpArr[third++]=data[left++];
}else{
tmpArr[third++]=data[mid++];
}
}
//剩余部分依次放入中间数组
while(mid<=right){
tmpArr[third++]=data[mid++];
}
while(left<=center){
tmpArr[third++]=data[left++];
}
//将中间数组中的内容复制回原数组
while(tmp<=right){
data[tmp]=tmpArr[tmp++];
}
System.out.println(Arrays.toString(data));
}
} |
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