循环中的 Java JMenuItem

Question

我想为颜色列表添加每个菜单项行，但有类似

的错误

"at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)"

在我的循环中添加 JMenuItem:

String[] colors = {
        "Blue", 
        "Yellow",
        "Orange",
        "Red", 
        "White", 
        "Black", 
        "Green", 
};

JMenuItem menuItem;
JMenu mnBackground = new JMenu("Background");
for (int mi=0; mi<=colors.length; mi++){
    String pos = colors[mi];
    JMenuItem Jmi =new JMenuItem(pos); // ERROR, though manually added Strings works...
    mnBackground.add(Jmi);
}

我该怎么办？

Answer 1

循环应该是:

for (int mi = 0; mi < colors.length; mi++)

不是

for (int mi = 0; mi <= colors.length; mi++)