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- import java.util.Collection;
- import java.util.HashMap;
- import java.util.HashSet;
- import java.util.Iterator;
- import java.util.Map;
- import java.util.Set;
- public class deneme2 {
- public static void main(String args[]) {
- Map<String,Integer> m = new HashMap<String,Integer>();
- m.put("serdar", 345);
- m.put("nezihe", 274);
- m.put("ahmet", 123);
- m.put("ahmet", 678);
- m.put("ali", 274);
- if(is1to1(m)) {
- System.out.println("1to1");
- } else {
- System.out.println("not");
- }
- }
- public static boolean is1to1(Map<String, Integer> m) {
- // her elemanΔ± bi kere tutan set
- Set<Integer> occurs = new HashSet<Integer>();
- // map'in values
- Collection<Integer> set = m.values();
- Iterator<Integer> itr = set.iterator();
- for(int i=0; itr.hasNext(); i++) {
- int val = itr.next();
- if(occurs.contains(val)) {
- return false;
- } else {
- occurs.add(val);
- }
- }
- return true;
- }
- }
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