Java Error Operator Cannot Be Applied To Int Int
Contents |
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the java operator + cannot be applied to int company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions operator cannot be applied to int c# Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million operator cannot be applied to java.lang.object int programmers, just like you, helping each other. Join them; it only takes a minute: Sign up operator < cannot be applied to java [closed] up vote 1 down vote favorite As below I've typed javac App.java on
Java Operator Cannot Be Applied To Boolean
mac Terminal and I see operator five errors, all are the same. I'm not sure how to fix it as below and I appreciate your pointers? I've import javabook.*; and this is JAVA code on Textpad. import javabook.*; //import java.util.Scanner; class App { public static void main(String args[]) { //declare variable String theNumber; //declare object Scanner someInput; //input System.out.println("Please enter area size : "); someInput = new Scanner(System.in); theNumber = someInput.nextLine(); //processing if operator ^ cannot be applied to double java ( theNumber < 20 ) { System.out.println( "It is too small." ) ; } else if ( theNumber > 20 && theNumber < 40 ) { System.out.println( "It is perfect size." ) ; } else if ( theNumber > 40 && theNumber < 60 ) { System.out.println( "It is too big." ) ; } //close the program without error System.exit(0); } } Terminal response as App.java:28: operator < cannot be applied to java.lang.String,int if ( theNumber < 20 ) I would appreciate your help? UPDATED: import javabook.*; //Same result Scanner or javabook. Tried both and it worked. import java.util.Scanner; //this is required class App { public static void main(String args[]) { //declare variable //String theNumber; //int theNumber = Integer.parseInt(someInput.nextLine()); int theNumber; //need to convert your string theNumber to an int first. If you search for that, you'll find lots, both here and on the internet generally. int a = Integer.parseInt(theNumber); //theNumber = someInput.nextInt(); //this is commented out so now down to two errors //declare object Scanner someInput; //input System.out.println("Please enter area size : "); someInput = new Scanner(System.in); theNumber = someInput.nextLine(); //processing if ( theNumber < 20 ) { System.out.println( "It is too small." ) ; } else if ( theNumber > 20 && theNumber < 40 ) { System.out.println( "It is perfect size." ) ; } else i
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings operator && cannot be applied to bool and int java and policies of this site About Us Learn more about Stack Overflow
Operator Cannot Be Applied To Operands Of Type Int Java
the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation
Operator Cannot Be Applied To Boolean Int
Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; http://stackoverflow.com/questions/16697465/operator-cannot-be-applied-to-java it only takes a minute: Sign up Error message: operator < cannot be applied to boolean,int up vote 1 down vote favorite I´m new to programming, and are doing som exercices. In this exercice I am supposed to write a program that reads in three numbers from the user of the program. The program is supposed to find the smallest http://stackoverflow.com/questions/6559669/error-message-operator-cannot-be-applied-to-boolean-int number, and print which one is the smallest number. Here is my code: import javax.swing.JOptionPane; public class Smallestnumber { public static void main( String args[] ) { // Defining variables: String firstnumberstring; String secondnumberstring; String thirdnumberstring; String result; int firstnumber; int secondnumber; int thirdnumber; // Making input frames: firstnumberstring = JOptionPane.showInputDialog( "Write first number!" ); secondnumberstring = JOptionPane.showInputDialog( "Write second number!"); thirdnumberstring = JOptionPane.showInputDialog( "Write third number!" ); // Converting stringvalues to int values: firstnumber = Integer.parseInt( firstnumberstring ); secondnumber = Integer.parseInt( secondnumberstring ); thirdnumber = Integer.parseInt( thirdnumberstring ); // Initialising printstring to an empty string: result = ""; if ( firstnumber < secondnumber < thirdnumber ) result = firstnumber + " is the smallest number!"; if ( firstnumber < thirdnumber < secondnumber ) result = firstnumber + " is the smallest number!"; if ( secondnumber < firstnumber < thirdnumber ) result = secondnumber + " is the smallest number!"; if ( secondnumber < thirdnumber < firstnumber ) result = secondnumber + " is the smallest number!"; if ( thirdnumber < firstnumber < secondnumber ) result = thi
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies http://stackoverflow.com/questions/26890817/error-operator-cannot-be-applied of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a cannot be minute: Sign up Error . operator < cannot be applied up vote 1 down vote favorite In Line 11 there is an error . operator < cannot be applied to java.lang.Object,java.lang.Object I don't quite understand this but then again I'm new to generics in Java . bear with me please. public void sortbykey() { LinkedList temp = new LinkedList(); LinkedList third = cannot be applied new LinkedList(); temp=head; if(temp!=null) { while(temp.next!=null) { if (temp.key < temp.next.key) { third.item = temp.key; temp.key = temp.next.key; temp.next.key = third.item; } else temp = temp.next; } } } java generics compiler-errors share|improve this question edited Nov 12 '14 at 15:43 Pshemo 70.8k1086131 asked Nov 12 '14 at 15:41 NateDrake07 61 Do you understand that Object's cannot be compared with < ? –afzalex Nov 12 '14 at 15:44 1 What is LinkedList used in LinkedList temp? It seems that it is your own type since standard one doesn't have key field. Anyway it looks like this field is of type Object and comparing Objects with < doesn't make sense (how would new Bike() should be compared with new Banana()?). –Pshemo Nov 12 '14 at 15:47 add a comment| 3 Answers 3 active oldest votes up vote 2 down vote Simply, this operator can be applied on numeric types, such as int, byte, double, float, etc and their boxing classes (such as Integer, Byte, etc.). It doesn't work combined with Generics, because the compiler doesn't know the exact types of the operands