Esempio

 try {
             URL url=new URL("foo");
} catch (MalformedURLException e) {
            //throw new RuntimeException(e);
                sneak(e);
}

StackTrace:

Exception in thread "main" java.net.MalformedURLException: no protocol: foo
	at java.net.URL.<init>(URL.java:567)
	at java.net.URL.<init>(URL.java:464)
	at java.net.URL.<init>(URL.java:413)
	at foo.Test.main(Test.java:15)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

invece di:

try {
             URL url=new URL("foo");
         } catch (MalformedURLException e) {
            throw new RuntimeException(e);

         }


Exception in thread "main" java.lang.RuntimeException: java.net.MalformedURLException: no protocol: foo
	at foo.Test.main(Test.java:17)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: java.net.MalformedURLException: no protocol: foo
	at java.net.URL.<init>(URL.java:567)
	at java.net.URL.<init>(URL.java:464)
	at java.net.URL.<init>(URL.java:413)
	at foo.Test.main(Test.java:15)
	... 5 more

Utility

public final class Util{
/**
 * lancia l'eccezione t anche se non è dichiarata nel metodo
 * ma senza farne il wrapparla in una RuntimeException
 */
public static RuntimeException throwUndeclared(Throwable t){
        if(t == null) throw new NullPointerException("t");
        Util.<RuntimeException>throw0(t);
        return null;
}

private static <T extends Throwable> void throw0(Throwable t) throws T {
  throw (T)t;
}
}