请问为什么会出这样的错误？

[eddiesun]

我写了一个树组件，构造函数掷出exception,可有错误显示d:\Xinox Software\JCreator Pro\MyProjects\mcs51\mainframe.java:13: unreported exception java.io.FileNotFoundException; must be caught or declared to be thrown
FileTree t=^new FileTree(s);

请问如何解决为什么？

[pleonheart]

java.io.FileNotFoundException一定要被捕捉
try {
//...
} catch (java.io.FileNotFoundException fnfx) {
//...
}