Compare User define class in TreeSet

DhirajGadekar · DhirajGadekar · commit 921555f9bf8e · 2023-08-10T23:16:45.000+05:30
diff --git a/Collection/15_TreeSet.java b/Collection/15_TreeSet.java
@@ -51,11 +51,14 @@ public static void main(String[] args) {
   		
 		// 12) public E higher(E);
   		System.out.println(ts.higher("Ashish"));
-		// 13) public E pollFirst();
+
+		// 13) public java.util.NavigableSet<E> descendingSet();
+		System.out.println(ts.descendingSet());		
+		// 14) public E pollFirst();
   		System.out.println(ts.pollFirst());
 		System.out.println(ts);
 
-		// 14) public E pollLast()
+		// 15) public E pollLast()
 		System.out.println(ts.pollLast());	
 		System.out.println(ts);
 	}
diff --git a/Collection/16_CompareUserDefineClass.java b/Collection/16_CompareUserDefineClass.java
@@ -0,0 +1,38 @@
+import java.util.*;
+
+class CricPlayer implements Comparable {
+	
+	String name = null;
+	CricPlayer(String name) {
+		
+		this.name = name;
+	}
+	
+	public int compareTo(Object obj) {
+		
+		return this.name.compareTo(((CricPlayer)obj).name);
+	}
+
+	public String toString() {
+		
+		return name;
+	}
+}
+class TreeSetDemo {
+	
+	public static void main(String[] args) {
+		
+		TreeSet ts = new TreeSet();
+
+		ts.add(new CricPlayer("Rohit"));
+		ts.add(new CricPlayer("Virat"));
+		ts.add(new CricPlayer("MSD"));
+		ts.add(new CricPlayer("MSD"));
+		ts.add(new CricPlayer("Surya"));
+		ts.add(new CricPlayer("Tilak"));
+		ts.add(new CricPlayer("Tilak"));
+		ts.add(new CricPlayer("Ishan"));
+
+		System.out.println(ts);
+	}
+}
