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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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Closed 7 years ago.
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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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String x = "5+7";
String []n = x.split("\\+");
System.out.println(n[0]); // =5
System.out.println(n[1]); // =\
Your code should work fine, but I'd try to make it more robust:
String test = "5 + 7";
String[] tokens = test.split("\\s*\\+\\s*");
for (String token : tokens) {
System.out.println(token);
}
The \\s* will allow for possible white-space between the numbers and the + char.
use
x.split("[+]");
That will split it correctly.
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public class project5{
public static void main(String args[]){
String[] storage = {"123457897", "123456","654654654"};
int current;
current = Integer.parseInt(storage[1].subString(1,5));
System.out.println(current);
}
}
So I'm trying to, as an exercise, just get the first 5 numbers in the first thing of the array and parse it as an integer and store it as the variable current. It gives me the error:
test.java:5: error: cannot find symbol
current = Integer.parseInt(storage[1].subString(1,5));
^
symbol: method subString(int,int)
location: class String
1 error
What is it that I'm doing wrong?
There is no subString method on the String class. There only is substring (all lowercase).
http://docs.oracle.com/javase/7/docs/api/java/lang/String.html
For variable, class and method names casing matters.
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I tried to use assertions in java from an example put forth from a site but it is not throwing an Assertion Error even if it does not conform to the requirements.
Where am I doing wrong?
package Sources;
import java.util.Scanner;
public class MyAssertion
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Enter your age");
int age = scanner.nextInt();
assert age>=18:"Not Valid !!";
System.out.println("Age is -- "+age);
}
}
I have also used the following command :
java -ea -cp ./classes Sources.MyAssertion
But even if I enter the age as 33 it is not throwing an error . Why?
Any help is much appreciated :)
Assertions fire when the condition is not true. If you enter 33 then that is greater than equal to 18, so all is well.
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I guess its a rather simple question but i just cant find my mistake.
int[] myIntArray = new int[20];
myIntArray[5] = 5;
int a = myIntArray[5];
TextIO.putf("arr[i]: d%",a );
The error I get is Illegal format string in TextIO.putf() method.
So I assume the value at the index 5 is not an int?
The error message says exactly what the problem is: your format string is wrong. You probably meant %d (or better yet, %d%n to add a newline).
The format string elements are in the form
%[modifiers]type
not
something%
Change d% to %d.