连接PLSQL Developer 13 (64 bit)时拒绝lian'j

Question

这个是连接数据库代码
package utli;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;

import javax.swing.plaf.synth.SynthStyle;

public class Tool {

//获取与数据库的连接
public static Connection getConn() {
    Connection conn=null;
    try {
        Class.forName("oracle.jdbc.driver.OracleDriver");
        conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ORCL", "scott", "123456");
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();


    }

    return conn;
}

//关闭数据库的连接
public static void close(Connection conn,PreparedStatement psmt) {
    try {
        if (conn!=null) {
            conn.close();
        }
        if (psmt!=null) {
            psmt.close();
        }
    } catch (Exception e) {
        // TODO: handle exception
    }

}
public static void main(String[] args) {
    Connection conn=Tool.getConn();

    if (conn!=null) {
        System.out.println("连接成功");
    }else {
        System.out.println("连接失败");
    }
}

}
报错信息
Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
The Connection descriptor used by the client was:
localhost:1521:ORCL
这个怎么解决各位da'l