它說exeption它線程「main」java.lang.noclassdeffounderror:後面跟着十三行「at java」。線程「main」中的異常java.lang.noclassdeffounderror
我嘗試了最常見的方法來解決這個錯誤,即時通訊全新的Java,這是讓我瘋了!非常令人沮喪。 :(我改變了「classpath」環境變量爲「。」,並將正確的路徑(C:\ Program Files \ Java \ jdk1.7.0_17 \ bin)也複製到了「path」變量中。 。我甚至在不同的計算機上試過它,結果完全相同(在我更改了環境變量後)。我從「fordummies」網站下載了代碼,所以我不認爲它的錯誤代碼... Ive花了最後4小時研究這個,我想它的時候求助於專家諮詢:) :)
// This program prompts for information about a loan and
// computes the monthly loan payment.
import java.util.*; // for Scanner
public class Mortgage {
public static void main(String[] args) {
Scanner console = new Scanner(System.in);
// obtain values
System.out.println("This program computes monthly " +
"loan payments.");
System.out.print("loan amount : ");
double loan = console.nextDouble();
System.out.print("number of years : ");
int years = console.nextInt();
System.out.print("interest rate : ");
double rate = console.nextDouble();
System.out.println();
// compute result and report
int n = 12 * years;
double c = rate/12.0/100.0;
double payment = loan * c * Math.pow(1 + c, n)/
(Math.pow(1 + c, n) - 1);
System.out.println("payment = $" + (int) payment);
}
}
的錯誤是:
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(unknown Source)
at java.security.AccessController.DoPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
請正確顯示*錯誤信息是什麼,*完全是*您如何嘗試運行它。 –
你在命令行上運行了哪些命令? –
可能的重複[爲什麼我會在Java中得到一個NoClassDefFoundError?](http://stackoverflow.com/questions/34413/why-am-i-getting-a-noclassdeffounderror-in-java) –