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Program122.java

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import java.util.*;

public class Program122 {

// Two Sum Problem

public static void main(String[] args) {

int[] nums = {2, 7, 11, 15};

int target = 9;

Map<Integer, Integer> map = new HashMap<>();

for (int i = 0; i < nums.length; i++) {

int complement = target - nums[i];

if (map.containsKey(complement)) {

System.out.println("Indices: " + map.get(complement) + ", " + i);

}

map.put(nums[i], i);

}

}

}