我试图让xpic等于vpic,就像下面的例子一样。当我尝试编译此代码时,我收到错误:"局部变量xpic可能尚未初始化"
ImageIcon xpic;
ImageIcon vpic;
vpic = new ImageIcon(getClass().getResource("Images/picture.png"));
vpic = xpic;
答案 0 :(得分:4)
我认为您有一个拼写错误,因为您的代码设置了vpic变量的引用,然后完全忽略了您设置它的内容,并尝试将其设置为xpic(可能是null
参考)。
从本质上讲,你所做的就等同于:
// both Strings are null
String str1;
String str2;
// assign a String object to str1:
str1 = "Hello";
// but then ignore and in fact discard the String object, and
// re-set str1 to null by assigning it str2
str1 = str2; //????
您可能想要更改
vpic = new ImageIcon(getClass().getResource("Images/picture.png"));
vpic = xpic;
到
vpic = new ImageIcon(getClass().getResource("Images/picture.png"));
xpic = vpic;