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TwoSum.java
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28 lines (23 loc) · 755 Bytes
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package array;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
public class TwoSum {
public static void main(String[] args) {
int[] nums = new int[]{0,2,8,9,13};
int target = 12;
int[] r = twoSum(nums,target);
System.out.print("输出的结果为："+ Arrays.toString(r));
}
private static int[] twoSum(int[] nums, int target) {
Map<Integer,Integer> map = new HashMap();
for (int i = 0; i < nums.length; i++) {
int c = target - nums[i];
if(map.containsKey(c)){
return new int[] {map.get(c),i};
}
map.put(nums[i],i);
}
throw new IllegalArgumentException("no such solutions!");
}
}