Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
General <strong>Java</strong> Questions II<br />
getting that error, you are trying to load a file that isnt a class and so the class loader<br />
in the JVM is throwing out that exception.<br />
Make sure you transfer the class files to site in binary mode, rather than text or ASCII<br />
mode.<br />
An error from the browser saying "cannot start applet ... bad magic number" usually<br />
means that one of the class files on the server is corrupted. '<br />
Replace your class binary files on the web server; clean up the cache of your<br />
browser, and reload your applet.<br />
Q: In java, I found a lot of methods, which let you enter a line (read (), readLine ()<br />
e.c.t). They all wait until return is pressed, and then start providing you the<br />
information.<br />
Does anyone know if there is a read method available whit the desired behaviour, i.e.<br />
which doesn't wait for return being pressed?<br />
Answer: <strong>Java</strong> does not provide it, the terminal itself waits until return is pressed<br />
before sending the entered line to <strong>Java</strong>.<br />
You need to use some platform specific mechanism to change the terminal settings.<br />
Q: Can I pass a function as a parameter in <strong>Java</strong>? If so, how?<br />
Answer: No, you cannot. But you can pass an object with method and then just use<br />
this method like this:<br />
myFunction (object); // object has method useMyMethod(){ do smth here...}<br />
..<br />
..<br />
somewhere in another place where use this function..<br />
object.useMyMethod();<br />
What is difference capacity() and size() methods for vector?<br />
What is difference between<br />
public final int capacity()<br />
Returns the current capacity of this vector.<br />
and<br />
public final int size()<br />
Returns the number of components in this vector.<br />
Answer: please read this method: ensureCapacity<br />
public final synchronized void ensureCapacity(int minCapacity)<br />
Increases the capacity of this vector, if necessary, to ensure that it can hold at least<br />
the number of components specified by the minimum capacity argument.<br />
Parameters:<br />
minCapacity - the desired minimum capacity.<br />
What're the differences between classpath and import in the java application?<br />
Do I need to have the package in the classpath first before importing in a java<br />
application or need not?<br />
file:///F|/350_t/350_tips/general_java-II.htm (8 of 13) [2002-02-27 21:18:24]
Change language