这是片段：
JPanel logoPanel=new JPanel();
GroupLayout logoLayout=new GroupLayout(logoPanel);
logoPanel.setLayout(logoLayout);
logoPanel.setHorizontalGroup((GroupLayout.Alignment.BASELINE).addGap(100,100));
logoPanel.setVerticalGroup((GroupLayout.Alignment.BASELINE).addGap(100,100));
这些是在cmd上产生的错误：
MainPageTypo.java:27: cannot find symbol
logoPanel.setHorizontalGroup((GroupLayout.Alignment.BASELINE).addGap(100,100));
^
symbol: method addGap(int,int)
location: class Alignment
MainPageTypo.java:28: cannot find symbol
logoPanel.setVerticalGroup((GroupLayout.Alignment.BASELINE).addGap(100,100));
^
symbol: method addGap(int,int)
location: class Alignment
2 errors
为什么会出现这些错误，我该如何解决？
最佳答案
根据JavaDoc GroupLayout.Group仅具有方法addGap(int)和addGap(int, int, int)，因此您丢失了一个参数或参数太多。
因此，addGap(100)就足够了。
编辑2：
您正在addGap(...)上调用GroupLayout.Alignment，这是一个枚举，根本不提供该方法：第28行包含(GroupLayout.Alignment.BASELINE).addGap(100,100)
我认为您想呼叫logoLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)或logoLayout.createSequentialGroup()创建一个组。
您还要在JPanel而不是GroupLayout上调用setHorizontalGroup(...)（和setVerticalGroup(...)），这也会产生错误。将其更改为logoLayout.setHorizontalGroup( ... );。
编辑：有关消息含义的简短提示
symbol: method addGap(int,int) //the symbol that is searched for
location: class Alignment //the symbol (method) is searched in class Alignment or its class hierarchy
MainPageTypo.java:28: cannot find symbol //the compiler cant find the symbol stated above which is used at line 28 in file MainPageTypo.java
logoPanel.setVerticalGroup((GroupLayout.Alignment.BASELINE).addGap(100,100)); // this is the content of line 28