KeyEvent使用Java 1.7但不使用1.6

Question

我们开发了一个基于Java 1.7（在eclipse中）开发的插件项目，并在java 1.6上构建（构建工具在Java 1.6上，我们很快就会升级到Java 1.7）。

我们在代码中使用密钥监听器，当核心应用程序在Java 1.7上运行时运行良好，但核心应用程序在Java 1.6上运行时却没有（当前生产环境在Java 1.6上运行，后者将进一步迁移到java 1.7）

任何想法，我们能为这个问题做些什么？

txtInput.addKeyListener(new KeyAdapter() {

        @Override
        public void keyPressed(KeyEvent e) {
            setAdjusting(cbInput, true);
            keyEvent = false;
            if (e.getKeyCode() == KeyEvent.VK_ENTER
             || e.getKeyCode() == KeyEvent.VK_UP
             || e.getKeyCode() == KeyEvent.VK_DOWN ) {
                selectionAllowed = true;
                e.setSource(cbInput);
                cbInput.dispatchEvent(e);
                keyEvent = true;
                if (e.getKeyCode() == KeyEvent.VK_DOWN
                 || e.getKeyCode() == KeyEvent.VK_UP ) {
                    if(cbInput.getSelectedItem() != null ) {
                        txtInput.setText(cbInput.getSelectedItem().toString()); 
                    }   
                }
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {                      
                    cbInput.setPopupVisible(false);
                    if(txtInput.getText() != null ) {
                        try {
                            BFMDateTime end_date;
                            BRMap map = new BRMap();
                            map.putElem("content", txtInput.getText().trim());
                            map.putElem("action", "ButtonClicked");
                            map.putElem("start_date", timeZone.bfmDateToSearchFormat(new BFMDateTime(uiObj.fromDate.getText().toString())));
                            end_date = new BFMDateTime(uiObj.toDate.getText().toString());
                            end_date.addHours(23);
                            end_date.addMinutes(59);
                            end_date.addSeconds(59);
                            map.putElem("end_date", timeZone.bfmDateToSearchFormat(end_date));
                            CommandMsg commandMsg = new CommandMsg(AppConstants.DEALER_SEARCH_COMMAND, map);
                            RequestHandler requestHandler = new RequestHandler();
                            requestHandler.handleRequest(commandMsg,AppConstants.RESPONSE_SOURCE,uiObj);
                        } catch (NumberFormatException e1) {
                            e1.printStackTrace();
                        } catch (BFMTimeException e1) {
                            e1.printStackTrace();
                        }

                    }
                } 
            }
            if (e.getKeyCode() == KeyEvent.VK_ESCAPE) {
                cbInput.setPopupVisible(false);
            }
            setAdjusting(cbInput, false);
        }
    });