65 lines
1.4 KiB
Java
65 lines
1.4 KiB
Java
import java.util.ArrayList;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.Set;
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public class Collectionz {
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public static void main(String[] args) {
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// ArrayList
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ArrayList<Integer> arr = new ArrayList<>();
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arr.add(45);
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arr.add(63);
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arr.add(24);
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arr.add(65);
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arr.add(74);
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arr.add(22);
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arr.add(3, 100);
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System.out.println(arr);
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Collections.sort(arr);
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System.out.println(arr);
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System.out.println(arr.contains(43));
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// Hashset
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HashSet<String> hs = new HashSet<>();
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hs.add("Sami");
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hs.add("Leena");
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hs.add("Zakaria");
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hs.add("Mohammed");
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hs.add("Sara");
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hs.add("Chekalil");
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hs.add("Benmoulay");
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hs.add("doctor");
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hs.add("Engineer");
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System.out.println(hs);
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Iterator<String> it = hs.iterator();
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while (it.hasNext()) {
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System.out.println(it.next());
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}
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System.out.println("");
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System.out.println("");
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System.out.println("");
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// HashMap
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//
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HashMap<Integer, String> hm = new HashMap<>();
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hm.put(0, "Zakaria");
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hm.put(1, "Sara");
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hm.put(2, "Leena");
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hm.put(3, "Sami");
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System.out.println(hm);
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Set sm = hm.entrySet();
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Iterator it2 = sm.iterator();
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while (it2.hasNext()) {
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System.out.println(it2.next());
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}
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}
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}
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