Q1]

import java.util.*;

public class TreeSetExample {
    public static void main(String[] args) {
       
        TreeSet<String> colors = new TreeSet<>();

       
        colors.add("Red");
        colors.add("Green");
        colors.add("Blue");
        colors.add("Yellow");
        colors.add("Orange");

        
        System.out.println("Colors in ascending order:");
        for (String color : colors) {
            System.out.println(color);
        }
    }
}


Q2]

import java.sql.*;
import java.io.*;
class Slip6_1
{
 public static void main(String a[])
 {
 PreparedStatement ps;
 Connection con;
 try{
 Class.forName("");
 con=DriverManager.getConnection("");
 if(con==null)
 {
 System.out.println("Connection Failed......");
System.exit(1);
 }
 System.out.println("Connection Esatablished......");
 Statement stmt=con.createStatement();
 BufferedReader br = new BufferedReader(new 
InputStreamReader(System.in));
 String query="insert into Customer values(?,?,?,?)";
 ps=con.prepareStatement(query);
 System.out.println("Customer Details....");
 System.out.println("Enter CID");
 int cid=Integer.parseInt(br.readLine()); 
 ps.setInt(1,cid); 
 System.out.println("Enter name");
 String name=br.readLine();
 ps.setString(2,name);
 System.out.println("Enter Address");
 String add=br.readLine();
 ps.setString(3,add);
 System.out.println("Enter Ph_No");
 String phno=br.readLine();
 ps.setString(4,phno);
 int no=ps.executeUpdate();
 if(no!=0)
 System.out.println("Data inserted succesfully.....");
 else
 System.out.println("Data NOT inserted");
 con.close();
 }
 catch(Exception e)
 {
 e.printStackTrace();
 }
 }
}