我目前正在處理代碼從端口到Netbeans。但是,我遇到了一些困難,因爲在處理中運行的完全相同的代碼在Netbeans java中運行時給了我一個空指針異常。 我面對的錯誤是這些:如何解決「線程中的異常」動畫線程「java.lang.NullPointerException」?
Exception in thread "Animation Thread" java.lang.NullPointerException
at gardeningmania.GardeningMania.loadPng(GardeningMania.java:303)
at gardeningmania.GardeningMania.setupThreading(GardeningMania.java:315)
at gardeningmania.GardeningMania.setup(GardeningMania.java:182)
at processing.core.PApplet.handleDraw(PApplet.java:2281)
at processing.core.PGraphicsJava2D.requestDraw(PGraphicsJava2D.java:243)
at processing.core.PApplet.run(PApplet.java:2177)
at java.lang.Thread.run(Thread.java:722)
這些是導致上述狀態的錯誤代碼的某些部分:
@Override
public void setup() {
setupThreading("/Menus/", menuLoader, menuThread);
setupThreading("/Navigations/", navLoader, navThread);
setupThreading("/Navigations2/", nav2Loader, nav2Thread);
}
void loadPng(File[] files, ImageLoader loader) {
for (int i = 0; i < files.length; i++) {
String path = files[i].getAbsolutePath();
if (path.toLowerCase().endsWith(".png")) {
loader.loadImg(path);
}
}
}
void setupThreading(String folderName, ImageLoader loader, Thread threading) {
File dir = new File(sketchPath + folderName);
File[] files = dir.listFiles();
threading = new Thread(loader);
loadPng(files, loader);
threading.start();
}
任何想法,我怎麼能着手解決這些錯誤?
請**以適當的方式使用格式** – Baby
使303行非空。 –
「menuLoader」或「navLoader」或「nav2Loader」爲空 –