GameType looks like an enum or a class with something that simulate an enum, so I would do that. So it will be something like : public enum GameType { Poker, BlackJack; } Which give something like in your example : public class Main { public static void main(String[] args) { GameType type = GameType.Poker; … Read more
Instead of setting a character variable which is discarded, I assume you want to use this character to build a new String. StringBuilder sb = new StringBuilder(); for (char ch : dna.toCharArray()) { switch (ch) { case ‘A’: sb.append(‘T’); break; case ‘T’: sb.append(‘A’); break; case ‘G’: sb.append(‘C’); break; case ‘C’: sb.append(‘G’); break; } } String … Read more
Is this what you’re looking for? public static int[] convertToBinary(int b) { if (b < 0 || b > 255) { throw new IllegalArgumentException(“Argument must be between 0 and 255”); } int[] result = new int[8]; // Working from the right side of the array to the left, we store the bits. for (int i … Read more
You should print the prompt before you accept user input, otherwise you won’t know what you are entering. For example, in your code String Destination = S.nextLine(); System.out.println(“Specify :” + Destination); That first line will halt and wait for output with no prompt as what to enter. Changing around a few lines should get you … Read more
you just need to change you code likewise, if(str.substring(1,3).equals(a)){…} what you did wrong is , you have been used ‘==’ assignment operator, it is not comparing content(here, string) instead of it, it compare’s memory location between two compared string. it’s obvious to get false, because how is it possible ? that two different string refer … Read more
If you really want to manually call the compiler, make sure to build in a proper output directory (not .), use it as with a -classpath argument, and compile the classes in the right order (TreeNode before FPTree). Or use ant, maven, or an IDE. 0 solved One java file use another java file compile … Read more
It Should be something like that: public class MyClass { public void setSerial(int ser) { serialNumber = ser; } public double computeArea() { return width*length; } } But that won’t work: public void displayBoxes(){ MyClass myClass = new MyClass(); DecimalFormat df = new DecimalFormat(“0.000”); System.out.println(toString()); System.out.println(“The rectangle with the serial number ” + myClass.setSerial(12345) + … Read more
public int indexOf(Object o) { if (o == null) { for (int i = 0; i < size; i++) if (elementData[i]==null) return i; } else { for (int i = 0; i < size; i++) if (o.equals(elementData[i])) return i; } return -1; } This is actual method in Arraylist ,after reading i came to know … Read more
Inside your while loop use the following code: System.out.print(“Enter the test score: “); while (!keyboard.hasNextInt()) {//Will run till an integer input is found System.out.println(“Only number input is allowed!”); System.out.print(“Enter the test score: “); keyboard.next(); } int tS = keyboard.nextInt(); //If input is a valid int value then the above while loop would not be executed … Read more
When you first run an app, you can display the welcome message & then create any normal file like any .txt. Make your code such that @ startup each time it will see if that file is present or not. If present, go to main screen n if not, show welcome message & create the … Read more
A Set is not what you want, because: Sets only hold unique values The elements of a Set have no order, so you can’t access elements by index A better choice is a List, such as an ArrayList, which allows any (ie duplicate) values and can be accessed by index using list.get(i). 2 solved Get … Read more
Consider the following Linked List: HEAD —> [“value2” | -]–> [“value3” | -]–> [“last_value” | null] Assuming current points to “value3”: HEAD —> [“value2” | -]–> [“value3” | -]–> [“last_value” | null] ↑ then current.next != null is true, since current.next is actually the “next” node. Now let’s assume current moved to “last_value”, now we’ll … Read more
A little bit simpler : public class Count { private static int count = 0; // resets the value to 0 public static void reset() { count = 0; } // updates the value public static String update() { count++; if(count == 1000) count = 1; return String.format(“%03d”, count); } // main() is used for … Read more
@Quincunx’s answer in the comments is correct, but writing whole programs like this violates all sorts of OO principles, and it’s not a good idea for readability, maintainability, etc. You probably want to go back and read some basic Java tutorials. For example, to use a method outside of the class that declares it, you … Read more
There was a problem with TypeConvertor in packaging. All the files were not getting downloaded from maven. Used maven-assembly-plugin to make a jar with dependencies. solved Apache Camel context getting stopped automatically