Which is a proper way to declare and throw exception of class XYException?

Correct way to make the Jframevisiable always on top of other windows ?

Output of the following code? public class Test extends Thread { private int value; public Test(int value) { this.value = value; } public static void main(String[] args) { Test t1 = new Test(1); Test t2 = new Test(2); Test t3 = new Test(3); t1.start(); t2.start(); t3.start(); } @Override public void run() { for (inti = 0; i< 3; i++) { System.out.println('Thread ' + value + ' with value ' + i + ' Started'); try { sleep(100); } catch (InterruptedException ex) { Logger.getLogger(Test.class.getName()).log(Level.SEVERE, null, ex); } System.out.println('Thread ' + value + ' with value '+ i + ' Completed'); } } }

The method foo() defined in the class Quiz has the following signature: public static double foo(double f) What can be said about foo()?

How can the string '1 2 3 3 4 4 5 1' be added to an ArrayList where each number separated by a space is added as a separate list item, and the list cannot have duplicates?

The code below is supposed to find the maximum value of array {6,15,2,5,8,14,10,16,11,17,13,7,1,18,3,4,9,12}. How can the code be substantially improved, if at all? public static intmaxOfArray(int[] a) { int length = a.length; if(length<1) throw new NoSuchElementException('Not at least one integer in array'); while (length > 1) { int k = length; for(inti = 0; i< length/2; i++) { k--; if(a[i]>a[k]) { int j = a[i]; a[i] = a[k]; a[k] = j; } } length /=2; } return a[0]; }

Java.applet defines how many interfaces?

To determine the width and height of an application, which of the following method is used?

Which method is called only once during the run time of your applet?

All Applets must import java.applet and java.awt.

Which of the following components allow multiple selections?