小编use*_*497的帖子

当我调用我的两个方法时,我得到一个空指针异常.我不知道,为什么我明白了.当我检查代码时似乎是正确的

这是我的HentbestillingsordreHandler班

public class HentbestillingsordreHandler extends JPanel{

private Connection con = null;
private ResultSet rs = null;
private HentbestillingsordreRegistrer ho;
private ArrayList<HentbestillingsordreRegistrer> hbor = new ArrayList<HentbestillingsordreRegistrer>();

HentbestillingsordreHandler() {

}

public void Hentbestillingsordre(){
    KaldSQL ks = new KaldSQL();
    try {
        con = ks.connectNow();
    } catch (ClassNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    ResultSet rs = ks.Hentalleordreliste(con);
    try {
        while(rs.next()){
            String status = "";
            if(rs.getInt("BestillingsStatus") == 1){
                status …