java jlabel 数组
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/4704278/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
java jlabel array
提问by jjj
what's wrong with this? the labels[] causes an error
这有什么问题？标签 [] 导致错误
JLabel labels[] = new JLabel();
for (int i = 0; i < 4; i++) {
labels[i] = new JLabel("Label" + i);
panel.add(labels[i]);
}
回答by
JLabel label = new JLabel();
initialize a single Jlabel if you want to initialize array you should do like that
如果要初始化数组，请初始化单个 Jlabel，您应该这样做
JLabel labels[] = new JLabel[4];
回答by lweller
JLabel labels[] = new JLabel[4];
and then you have to create new instances for each array entry (otherwise array contains only nulls)
然后你必须为每个数组条目创建新实例（否则数组只包含空值）
for(JLabel label : labels) {
label = new JLabel();
}
回答by Nipuna
First of all you must define the array. Then you can play with the methods in it.
首先，您必须定义数组。然后你可以使用其中的方法。
Labels = new JLabel[]{ label1, label2, label3 };
for(int i=0; i<Labels.length; i++){
add(Labels[i]);
}
回答by Yassine Klilich
there is a problem with declaring JLabel array,
声明 JLabel 数组有问题，
JLabel labels[] = new JLabel(); //Incorrect code
JLabel[] labels = new JLabel[enter the size]; //Correct One
