将Jbutton添加到Jpanel

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有人可以告诉我这段代码有什么问题吗?我正在尝试将按钮添加到我的JPanel中

can somebody tell me what is wrong with this code i am trying to add the buttons to my JPanel

ArrayList<JButton> buttons = new ArrayList<JButton>(); JPanel createButtonspane(){ bpanel = new JPanel(); for(int i=0; i<10; i++){ buttons.add(new JButton(""+i)); bpanel.add(buttons); } return bpanel; }

推荐答案

该代码无法编译，因为JPanel没有add()的重载，该重载需要JButton s的数组，因此您不能添加JPanel的整个按钮阵列(即使有可能，您也需要在for()循环之外进行操作).

This code does not compile because JPanel does not have an overload of add() which takes an array of JButtons, so you can not add a whole array of buttons to the JPanel (even if it was possible, you would need to do it outside of your for()-loop).

只需将按钮直接添加到JPanel:

Simply add your button directly to the JPanel:

JPanel createButtonspane(){ bpanel = new JPanel(); for(int i=0; i<10; i++){ bpanel.add(new JButton(""+i)); } return bpanel; }

如果以后仍然需要引用各个JButton，请将它们另外添加到数组中:

If you still need to refer to the individual JButtons later, add them to the array in addition:

JPanel createButtonspane(){ bpanel = new JPanel(); for(int i=0; i<10; i++){ JButton button = new JButton(""+i); buttons.add(button); bpanel.add(button); } return bpanel; }