JDBC Inserts a date with PreparedStatement in Oracle

create table STUDENT (ID number (6) NOT NULL, NAME NVARCHAR2 (m), age number (3), SEX number (1), birthday DATE) 

public class Dbutil {private final String driver= "Oracle.jdbc.driver.OracleDriver";
	Private final String url= "Jdbc:oracle:thin: @localhost: 1521:ORCL";
	Private final String Username= "Scott";
	
	Private final String userpwd= "Tiger";
	Connection Conn=null;
	PreparedStatement Pst=null;
	ResultSet Rs=null; 
			Public Connection getconnection () throws SQLException, classnotfoundexception{if (conn==null) {class.forname (DRIVER);
		Conn=drivermanager.getconnection (URL,USERNAME,USERPWD);
	Return conn;
		public int executeupdate (String sql,object[]params) throws SQLException, classnotfoundexception{getconnection ();
		Pst=conn.preparestatement (SQL);
			if (params!=null&¶ms.length!=0) {for (int i = 0; i < params.length i++) {pst.setobject (i+1, params[i]);
		} int result=pst.executeupdate ();
	return result; }

}

	public void Save (Student stu) {
		String sql= ' insert into Student (id,name,age,sex,birthday) VALUES (sq_student_ Id.nextval,?,?,?,?) ";
		Object []params={stu.getname (), Stu.getage (), Stu.getsex (), Stu.getbirthday ()};
		Dbutil dbutil=new dbutil ();
		try {
			dbutil.executeupdate (SQL, params);
		} catch (SQLException e) {
			e.printstacktrace ();
		} catch ( ClassNotFoundException e) {
			e.printstacktrace ();
		} finally{
			Dbutil.closeall ();
		}
		
	

		Scanner input=new Scanner (system.in);
		System.out.print ("Please enter user name:");
		String name=input.nextline ();
		System.out.print ("Please enter Age:");
		int Age=input.nextint ();
		System.out.print ("Please enter gender (1: Male, 0: female):");
		int Sex=input.nextint ();
		System.out.print ("Please enter the date of birth (format: XXXX-XX-XX):");
		Input.nextline ();
		String birthdaystr=input.nextline ();
		SimpleDateFormat sdf=new SimpleDateFormat ("Yyyy-mm-dd");
		Date Birthday=null;
		Student Stu=null;
		try {
			birthday=sdf.parse (BIRTHDAYSTR);
			Stu=new Student (name,age,sex,new java.sql.Date (Birthday.gettime ()));
		catch (ParseException e) {
			 stu=new Student (name,age,sex);
		}
		
		Studentdao studao=new Studentdao ();
		Save
		Studao.save (Stu);

If you use the statement object, the following:

String sql= "INSERT into student (Id,name,age,sex,birthday) VALUES (Sq_student_id.nextval, '"
				+stu.getname () + "'," + Stu.getage () + "," +stu.getsex () + ", To_date (' +stu.getbirthday () +" ', ' Yyyy-mm-dd ')) ";