请问内联类应该怎么设置变量
先看程序
public String GetFileChooser(String strExt,String strButton,boolean bSave)
{
JFileChooser jf = new JFileChooser(".");
jf.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
jf.setFileFilter(new javax.swing.filechooser.FileFilter()
{
public boolean accept(File f)
{
String filePath = f.getAbsoluteFile().toString().toUpperCase();
if (filePath.endsWith(strExt))
return true;
else
return false;
}

public String getDescription()
{
return strExt;
}
});
jf.setApproveButtonText(strButton);
int result = -1;
if(bSave)
result = jf.showSaveDialog(null);
else
result = jf.showOpenDialog(null);
if(result == JFileChooser.APPROVE_OPTION)
return jf.getSelectedFile().getPath();
else
return null;
}

程序指明是strExt变量出错，虽然知道错误的地方，但不知道该如何更正望指教

[解决办法]

Java code

public String GetFileChooser(String strExt,String strButton,boolean bSave)        {        final String str = strExt;//加上这句.. 内部类要引用外部类的变量..该变量必须是final的.        JFileChooser jf = new JFileChooser(".");        jf.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);        jf.setFileFilter(new javax.swing.filechooser.FileFilter() {            public boolean accept(File f) {                String filePath = f.getAbsoluteFile().toString().toUpperCase();                if (filePath.endsWith(str))                    return true;                else                    return false;            }            public String getDescription() {                return str;            }        });        jf.setApproveButtonText(strButton);        int result = -1;        if (bSave)            result = jf.showSaveDialog(null);        else            result = jf.showOpenDialog(null);        if (result == JFileChooser.APPROVE_OPTION)            return jf.getSelectedFile().getPath();        else            return null;    } }