從Jlist刪除文件

Question

不知道我在做什么錯。 我正在嘗試從目錄中刪除所選文件，但只是從列表中刪除它。 謝謝

  private void deletecustButtonActionPerformed(java.awt.event.ActionEvent evt) {
    DefaultListModel model = (DefaultListModel) customerList.getModel();

    int selectedIndex = customerList.getSelectedIndex();
    File customer = new File("Customers/" + selectedIndex);
    if (selectedIndex != 1) {
      customer.delete();
      model.remove(selectedIndex);
    }
  }

Answer 1

 int selectedIndex = customerList.getSelectedIndex();

我懷疑您想獲取selectedIndex（）。

我認為您想獲得選定的值：

String fileName = customerList.getSelectedValue().toString();
File customer = new File("Customers/" + fileName);

Answer 2

如果要一鍵刪除列表中的幾個選定文件：

private void deletecustButtonActionPerformed(java.awt.event.ActionEvent evt) {
    String fileName;
    DefaultListModel model = (DefaultListModel) customerList.getModel();
    // Get the number of selected files 
    // (corresponding of the size of the int[] customerList.getSelectedIndices() ).
    int numberOfSelections = customerList.getSelectedIndices().length;
    int selectedIndex=0;
    File customer = null;
    // Loop to remove all selected items except your n#1 cust.
    // We begin at the end because the list will be "cut" each turn of the loop
    for(int i = numberOfSelections-1; i >=0 ; i--){
        // Get the selected index
        selectedIndex = customerList.getSelectedIndices()[i];
        if (selectedIndex != 1) {
            fileName = model.getElementAt(selectedIndex);
            customer = new File("Customers/" + fileName );
            customer.delete();
            model.remove(selectedIndex);
        }          
    }
  }