class Deadlock {
    public static void main(String[] args) {
        final String r1 = "R1", r2 = "R2";
        new Thread(() -> { 
            synchronized(r1){ 
                try{
                    Thread.sleep(100);
                }
                catch(Exception e){} 
                synchronized(r2){}
            } 
        }).start();
        new Thread(() -> { 
            synchronized(r2){ 
                try{
                    Thread.sleep(100);
                }
                catch(Exception e){} 
                synchronized(r1){}
            } 
        }).start();
        System.out.println("Deadlock created!");
    }
}

//Program to display table data 
import java.sql.*;
class JdbcExample {
    public static void main(String[] args) throws Exception {
        Class.forName("com.mysql.cj.jdbc.Driver");
        Connection con = DriverManager.getConnection("jdbc:mysql://localhost/test","root","pass");
        Statement st = con.createStatement();
        ResultSet rs = st.executeQuery("select * from student");
        while(rs.next())
            System.out.println(rs.getInt(1)+" "+rs.getString(2));
        con.close();
    }
}