import java.sql.Connection; import java.sql.DriverManager; import java.sql.Statement; import java.sql.ResultSet; import java.sql.SQLException; import java.io.IOException;  class testMaxConn{   public static void main(String args[]){     int count=0;     Connection []conn=new Connection[1000];     Statement  []stmt =new Statement[1000];     ResultSet  []rs =new ResultSet[1000];    try{     Class.forName("com.MySQL.jdbc.Driver").newInstance();for(count=0;count<300;count++){conn[count] = DriverManager.getConnection("jdbc:mysql://localhost/MySQL", "root", "");      stmt[count]=conn[count].createStatement();      rs[count]=stmt[count].executeQuery("SELECT * FROM user");      while (rs[count].next()){  //System.out.println(rs.getString(1)+"\t "+rs.getString(2));        }      System.out.print(count+"\t");     }              }catch(SQLException ex1){      System.out.println("\n"+ex1.toString());    }catch(InstantiationException ex2){      System.out.println("\n"+ex2.toString());    }catch(ClassNotFoundException ex3){      System.out.println("\n"+ex3.toString());    }catch(IllegalAccessException ex4){      System.out.println("\n"+ex4.toString());    }finally{      try{        System.out.println("\nSystem has opened "+count--+" MySQL connections.\nPress Enter key to close the connections");        System.in.read();        System.out.println("\nClose the Connections:");        for(;count>=0;count--){         rs[count].close();         stmt[count].close();         conn[count].close();         System.out.print(count+"\t");        }      }catch(SQLException ex){       System.out.println("\n Close connection exception:"+ex.toString());      }catch(IOException io_ex){}    }//end the first "try"   } }