How to query all records using JDBC

public class Jdbcdao {
Private Connection Conn=null; Database Connection Object
Private String Strsql=null;

JDBC Connection Database
Public Jdbcdao () {

String Driver = "Com.mysql.jdbc.Driver";
try {
Class.forName (driver);
String url = "Jdbc:mysql://localhost:3306/dev?characterencoding=utf8";
Conn=drivermanager.getconnection (URL, "root", "");
SYSTEM.OUT.PRINTLN ("Connect MySQL database successfully");

} catch (Exception e) {
Todo:handle exception
E.printstacktrace ();
}
}

Query all student information and query all data for a table
public void query (Student Student) {
Statement Stmt=null; SQL Statement Object
ResultSet Rs=null; Saving result set objects
Student stu=new Student (); Instantiating student objects
try {
Strsql= "SELECT * from student"; Querying SQL statements
Stmt=conn.createstatement (Rs. Type_scroll_insensitive,rs. CONCUR_READ_ONLY);
Execute SQL statement
Rs=stmt.executequery (strSQL); return result set
while (Rs.next ()) {//loops through the result set, takes a value, sets the Student object property value.
Stu.setid (Rs.getint ("id"));
Stu.setname (rs.getstring ("name"));
Stu.setphone (rs.getstring ("Phone"));
Stu.setstuno (rs.getstring ("Stuno"));
Stu.setbirthday (rs.getstring ("Brithday"));
SYSTEM.OUT.PRINTLN ("Query Success" +strsql);
}
} catch (Exception e) {
Todo:handle exception
E.printstacktrace ();
}

SYSTEM.OUT.PRINTLN ("Query data Success" +strsql);

}

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How to query all records using JDBC