Create HashSetTest2.java

Author: apoorvaa30

Collections/HashSetTest2.java

@@ -0,0 +1,47 @@
+//version 11.1
+
+import java.util.*;
+
+class Student
+{
+	int rollno,marks;
+	char grade;
+	String name;
+	Student(int rollno,int marks,String name)
+	{
+		this.rollno=rollno;
+		this.marks=marks;
+		this.name=name;
+	}
+	public String toString()
+	{
+		return(rollno+"   "+name+"   "+marks);
+	}
+	public int hashCode()
+	{
+		return(rollno);
+	}
+	public boolean equals(Object ob)
+	{
+		Student st=(Student)ob;
+		return(rollno == st.rollno && marks == st.marks);	
+	}	
+}
+class HashSetTest2
+{
+	public static void main(String s[])
+	{
+		HashSet hs=new HashSet();
+		hs.add(new Student(101,85,"abc"));
+		hs.add(new Student(102,75,"xyz"));
+		hs.add(new Student(103,65,"pqr"));
+		hs.add(new Student(101,85,"hij"));
+	
+		Iterator itr=hs.iterator();
+		while(itr.hasNext())
+		{
+			System.out.println(itr.next());
+		}	
+	}
+}
+