import java.sql.*;
import java.io.*;

public class prog1 {
    public static void main(String args[]) {
        String dbname = "BD22";
        String dbuser = "postgres";
        String password = "12345";
        String url = "jdbc:postgresql://localhost:5432/" + dbname;

        try {
            BufferedReader in;
            in = new BufferedReader( new InputStreamReader( System.in ));
            System.out.println("Insira um novo passageiro");
            System.out.print(">> Nome: "); String nomePassageiro = in.readLine();
            System.out.print(">> Morada: "); String destinopretendido = in.readLine();
            System.out.println("Nome: " + nomePassageiro + "    Morada: " + destinopretendido);
            Connection c = DriverManager.getConnection(url);
            c.setAutoCommit(false);
            Statement stmt = c.createStatement();
            String sql = "INSERT INTO passageiros(nomeP,destinopretendido) VALUES ('" +
                    nomePassageiro + "','" + destinopretendido + "');";
            stmt.executeUpdate(sql);
            stmt.close();
            c.commit();
            c.close();
            System.out.println("Estudio " + nomePassageiro + " inserido.");
        }
        catch (Exception e) {
            System.err.println( e.getClass().getName()+": "+ e.getMessage() );
            System.exit(0);
        }
    }
}

当我启动代码时，我可以编写所有内容，但当程序启动“阶段”（在该阶段中，它应该将所编写的内容添加到数据库中）时，标题错误出现，当我调试它时，它出现：已断开与目标VM的连接，地址：“127.0.0.1：54160”，运输：“插座”有人能帮我吗？