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When my application compiles, it will not accept the input for roomNum on the same line in which it asks, "Please enter a room to search for:"
System.out.println();
if(roomNum < 0);
{
System.out.println("Please enter a room to search for: ");
roomNum = input.nextInt();
}
If I just use next instead of nextInt, it doesn't compile correctly.
The code above works, but will not accept the input on the same line which is the functionality I need.
Two things: Remove semi-colon after if condition and use System.out.print() instead if you want input on the same line.
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import java.util.*;
class Solution {
public static void main(String d[]) {
Scanner sc=new Scanner(System.in);
String s0=sc.next();
String p[]=s0.split(" ");
System.out.println(p.length);
}
}
I am using jdk version 8 and when i am giving input as "hello world java", it is printing length as 1 ,whereas it should print the length as 3,please help me in resolving this
Scanner.next() will get the input from the user till a space is encountered. For the input "hello world java" it only assign "hello"
If you want to include spaces also use Scanner.nextLine()
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I have this code:
item.replaceAll("\\s+", " ")
and this is the string
"The census request file for completion has been attached. In addition, the attached Client Checklist "
It doesn't work: double space remains after the period, so ". If" is unchanged.
I don't understand WHY!?
Since String.replaceAll() method is not an in-place operation, you should write like this:
item = item.replaceAll("\\s+", " ")
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This might be a bit of a stupid question, but I can't figure this out! I'm working on a minigame that involves one player being randomly selected as the terminator, and all the rest as weaklings. I have an ArrayList of players, and I can get it to choose the terminator, and then I need it to copy players into weaklings, but skip terminator. The code I'm using doesn't copy anything at all into weaklings. Here's the code I'm using, could someone a bit more experienced help me out please:
for (int i = 0; i < players.size(); i++ ) {
if (!players.get(i).contentEquals(terminator)) {
players.add(players.get(i));
}
}
System.out.print("The other players are: " + weaklings + ".");
}
You add to the players again: players.add, instead of weaklings.add.
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It's a block of code for random verification code in a Servlet book.
the underlined part must be a number of 30+?
but the intention is one of those chars above
Pic
NextInt method only has one parameter which is the max number (exclusive)?
So is it a mistake in the book?
nextInt(int) returns a [pseudo]random number between 0 and the parameter passed to it, exclusive. Thus, if you pass a length of an array, you'd get a random valid index from the array, which you can then use to pick a random element from it, as this code does.
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I'm trying to count the number of items in a scanner object which are divisible by 2.
My code looks like this:
while (s.hasNext()) {
num = s.nextInt();
if ((num % 2) == 0); {
count++;
}
}
For every integer in the object though, count is increasing by 1, regardless if it is divisible by 2, or not. Can someone tell me what I'm doing wrong?
You have a semicolon (;) after your if clause. That means empty code is executed if the condition is true and the code in the code block is always executed.
The ; after the if should be omitted