java - 在一帧中将对象添加到 Arraylist，但无法在第二个已打开的帧中访问它

Question

有点奇怪，但我有一个包含搜索栏的框架，这样当用户输入某个药物名称时，它将搜索包含所有药物的数组列表(allDrugs)，并简单地在文本区域中显示其信息.

这工作正常，但如果我然后去创建另一种打开第二个框架的药物，填写所有信息，将该信息保存为新的药物对象，然后将其添加到 allDrugs 数组列表中，然后我返回到仍然打开的原始框架并尝试搜索新药物名称，但无法找到该新创建的药物。

这几乎就像我必须刷新框架，但我已经尝试过，removeAll，validate()，repaint()但它仍然找不到新药物。下面是搜索栏，有点像主窗口或框架 1。

searchButton.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            if(e.getSource() == searchButton)
            {
                try
                {
                    for(Drug d: allDrugs)
                    {
                        //finished here, makesure that the string that comes in from the name of the drug from the field is the same as the one already i nthe arraylist
                        //Done by capitalising the first letter no matter what.
                        if(d.getName().equalsIgnoreCase(searchField.getText()))
                        {
                                MainMenu.textArea.setText(null);
                                MainMenu.textArea.append(d.allDetailsToString());
                                MainMenu.textArea.setEditable(false);
                                break;
                        }

                        JOptionPane.showMessageDialog(null, "Drug not found");
                        break;

                    }
                }
                catch(Exception ex)
                {
                    JOptionPane.showMessageDialog(null, "Error when searching for drug");
                }
            }

这是frame2中存在的createDrug方法:

 private void createDrug(ArrayList<Drug>allDrugs)
        {  
 String name = nameField.getText().substring(0,1).toUpperCase() + nameField.getText().substring(1);
                Drug drug = new Drug(name, classField.getText(), aimArea.getText(), moaArea.getText(), altArea.getText(), dosageArea.getText(), observationArea.getText(), durationArea.getText(), elimArea.getText(), unwantedArea.getText(), interactionArea.getText(), ideasArea.getText());
                allDrugs.add(drug);

如果这有点难以理解，我深表歉意。那么，当在 nframe 2 中创建新药物时，我该如何做到这一点，那么在frame1 中仍然打开的搜索栏将拾取新添加的药物？提前致谢!

Answer 1

您是否尝试过搜索药品列表中除第一项以外的任何项目？据我所知，一旦发现第一个项目不是目标，您的 foreach 循环就会中断。

for(Drug d: allDrugs)
{
    //finished here, makesure that the string that comes in from the name of the drug from the field is the same as the one already i nthe arraylist
    //Done by capitalising the first letter no matter what.
    if(d.getName().equalsIgnoreCase(searchField.getText()))
    {
         MainMenu.textArea.setText(null);
         MainMenu.textArea.append(d.allDetailsToString());
         MainMenu.textArea.setEditable(false);
         break;
    }
    //this will run for the first loop round and it will break the loop if the first item in list is not the search target
    JOptionPane.showMessageDialog(null, "Drug not found");
    break;

}

您的 JOptionPane.showMessageDialog(null, "Drug not find"); 应该位于循环之外，并且 break; 应该被抛出。

boolean found = false;
for(Drug d: allDrugs)
{
    //finished here, makesure that the string that comes in from the name of the drug from the field is the same as the one already i nthe arraylist
    //Done by capitalising the first letter no matter what.
    if(d.getName().equalsIgnoreCase(searchField.getText()))
    {
         MainMenu.textArea.setText(null);
         MainMenu.textArea.append(d.allDetailsToString());
         MainMenu.textArea.setEditable(false);
         found = true;
         break;
    }
}
if(!found)
    JOptionPane.showMessageDialog(null, "Drug not found");     

希望有帮助。