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Home » Newcomers » Newcomers » "cin cannot be resolved"(Error message "cin cannot be resolved" in Eclipse for Java program.)
"cin cannot be resolved" [message #1849231] Sun, 09 January 2022 18:34 Go to next message
Debbie Davis is currently offline Debbie DavisFriend
Messages: 1
Registered: January 2022
Junior Member
I am a beginner in learning java. The following simple program gives me several error messages of "cin cannot be resolved"

package testingProject;
public class MainClass {
public static void main(String[] args) {
// TODO Auto-generated method stub

double angle1, angle2, angle3;
System.out.print("Enter 1st angle: ");
angle1 = Double.parseDouble(cin.nextLine());
System.out.print("Enter 1st angle: ");
angle2 = Double.parseDouble(cin.nextLine());
System.out.print("Enter 2nd angle: ");
angle3 = 180 - angle - angle2;


Error messages:
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
cin cannot be resolved
cin cannot be resolved
angle cannot be resolved to a variable

at testingProject.MainClass.main(
What should I do to fix it?
Re: "cin cannot be resolved" [message #1849234 is a reply to message #1849231] Sun, 09 January 2022 23:11 Go to previous message
Nitin Dahyabhai is currently offline Nitin DahyabhaiFriend
Messages: 4263
Registered: July 2009
Senior Member

This isn't really a Java programming forum. You might want to ask in . That said, you should
have been getting error messages in the Java Editor indicating that cin and angle can't be resolved,--you have not
declared either of them as local variables.

Nitin Dahyabhai
Eclipse Web Tools Platform
Previous Topic:Java Eclipse doesn't show any error (the red bulb) but the code still can't run
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