Question

I'm new to Java and I have tried repeatedly to fix this... I have thirty errors

* @(#)Input.java
*
* Input application
*
* @author
* @version 1.00 2015/6/24
*/

import javax.swing.JOptionPane;
import java.util.Random;

public class Input {

    public static void main(String[] args) {

        // TODO, add your application code

        String name = JOptionPane.showInputDialog("Rock, Paper, or Scissors?");
        System.out.println(name+"!");
        Random rn = new Random();
        random.nextInt(10 - 1 + 1) + 1;
}


        if (name.equalsIgnoreCase("Rock")){
            if (0<randomInt && randomInt<4){
                System.out.println("Paper! You Lose!");
        }
            else if(4<= randomInt &&randomInt <=6){
                System.out.println("Rock! We Tied!");
            }
                else{
                System.out.println("Scissors! You Win!");
            }
    }
    if (name.equalsIgnoreCase("Paper")){
                    if (0<randomInt && randomInt<4){
            System.out.println("Scissors! You Lose!");
        }
            else if(4<= randomInt &&randomInt <=6){
                System.out.println("Paper! We Tied!");
            }
                else{
                System.out.println("Rock! You Win!");
            }
    }
    }
    if (name.equalsIgnoreCase("Scissors")){
                    if (0<randomInt && randomInt<4){
            System.out.println("Rock! You Lose!");
        }
            else if(4<= randomInt &&randomInt <=6){
                System.out.println("Scissors! We Tied!");
            }
                else{
                System.out.println("Paper! You Win!");
            }
    }
    }

When it is ran:

--------------------Configuration: Input - JDK version 1.7.0_05 <Default> - <Default>--------------------
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:22: error: not a statement
        random.nextInt(10 - 1 + 1) + 1;
                                   ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:26: error: illegal start of type
        if (name.equalsIgnoreCase("Rock")){
        ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:26: error:    <identifier> expected
            if (name.equalsIgnoreCase("Rock")){
                                 ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:26: error: ';' expected
        if (name.equalsIgnoreCase("Rock")){
                                  ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:26: error: illegal start of type
        if (name.equalsIgnoreCase("Rock")){
                                        ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:26: error: <identifier> expected
        if (name.equalsIgnoreCase("Rock")){
                                         ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:26: error: ';' expected
        if (name.equalsIgnoreCase("Rock")){
                                          ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:27: error: illegal start of type
            if (0<randomInt && randomInt<4){
            ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:27: error: <identifier> expected
            if (0<randomInt && randomInt<4){
              ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:27: error: ';' expected
            if (0<randomInt && randomInt<4){
                ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:27: error: > expected
            if (0<randomInt && randomInt<4){
                           ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:27: error: illegal start of type
            if (0<randomInt && randomInt<4){
                            ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:27: error: '(' expected
            if (0<randomInt && randomInt<4){
                                        ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:27: error: <identifier> expected
            if (0<randomInt && randomInt<4){
                                         ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:27: error: illegal start of type
            if (0<randomInt && randomInt<4){
                                          ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:27: error: <identifier> expected
            if (0<randomInt && randomInt<4){
                                           ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:28: error: '(' expected
                System.out.println("Paper! You Lose!");
                ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:28: error: illegal start of type
                System.out.println("Paper! You Lose!");
                      ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:28: error: ';' expected
                System.out.println("Paper! You Lose!");
                          ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:28: error: invalid method declaration; return type required
                System.out.println("Paper! You Lose!");
                           ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:28: error: illegal start of type
                System.out.println("Paper! You Lose!");
                                   ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:30: error: class, interface, or enum expected
                else if(4<= randomInt &&randomInt <=6){
                ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:32: error: class, interface, or enum expected
                }
                ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:35: error: class, interface, or enum expected
                }
                ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:40: error: class, interface, or enum expected
            }
            ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:43: error: class, interface, or enum expected
                }
                ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:46: error: class, interface, or enum expected
                }
                ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:52: error: class, interface, or enum expected
            }
            ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:55: error: class, interface, or enum expected
                }
                ^
    C:\Users\gw\Documents\JCreator LE\MyProjects\Input\src\Input.java:58: error: class, interface, or enum expected
                }
                ^
30 errors

Process completed.

Answer 1

The first problem is you're using randomInt in all your statements, but you defined rn. So the compiler has no idea what randomInt is. Edit: Please fix that and post any more errors. Another problem is that you closed off your main function right under the random.nextInt(10 - ....) statement.

Answer 2

Not sure how you got such messed up code. PFB working code with all corrections: import javax.swing.JOptionPane; import java.util.Random; public class Input { public static void main(String[] args) { String name = JOptionPane.showInputDialog("Rock, Paper, or Scissors?"); System.out.println(name + "!"); Random random = new Random(); int randomInt = random.nextInt(10 - 1 + 1) + 1; if (name.equalsIgnoreCase("Rock")) { if (0 < randomInt && randomInt < 4) { System.out.println("Paper! You Lose!"); } else if (4 <= randomInt && randomInt <= 6) { System.out.println("Rock! We Tied!"); } else { System.out.println("Scissors! You Win!"); } } if (name.equalsIgnoreCase("Paper")) { if (0 < randomInt && randomInt < 4) { System.out.println("Scissors! You Lose!"); } else if (4 <= randomInt && randomInt <= 6) { System.out.println("Paper! We Tied!"); } else { System.out.println("Rock! You Win!"); } } if (name.equalsIgnoreCase("Scissors")) { if (0 < randomInt && randomInt < 4) { System.out.println("Rock! You Lose!"); } else if (4 <= randomInt && randomInt <= 6) { System.out.println("Scissors! We Tied!"); } else { System.out.println("Paper! You Win!"); } } } }

Answer 3

You have not defined randomInt variable. As well as closing braces are not matching up correctly. That is creating these errors. Please find below code, which will work correctly: import javax.swing.JOptionPane; import java.util.Random; public class Input { public static void main(String[] args) { // TODO, add your application code String name = JOptionPane.showInputDialog("Rock, Paper, or Scissors?"); System.out.println(name+"!"); Random rn = new Random(); int randomInt= rn.nextInt(10)+1; if (name.equalsIgnoreCase("Rock")){ if (0<randomInt && randomInt<4){ System.out.println("Paper! You Lose!"); } else if(4<= randomInt &&randomInt <=6){ System.out.println("Rock! We Tied!"); } else{ System.out.println("Scissors! You Win!"); } } if (name.equalsIgnoreCase("Paper")){ if (0<randomInt && randomInt<4){ System.out.println("Scissors! You Lose!"); } else if(4<= randomInt &&randomInt <=6){ System.out.println("Paper! We Tied!"); } else{ System.out.println("Rock! You Win!"); } } if (name.equalsIgnoreCase("Scissors")){ if (0<randomInt && randomInt<4){ System.out.println("Rock! You Lose!"); } else if(4<= randomInt &&randomInt <=6){ System.out.println("Scissors! We Tied!"); } else{ System.out.println("Paper! You Win!"); } } } }

Answer 4

Isn't random.nextInt(10 - 1 + 1) + 1 just an expression? Put it in the context of something bigger... like an assignment operation

Answer 5

As @Marcin said, randomInt is not defined: Random rn = new Random(); random.nextInt(10 - 1 + 1) + 1; And random is not defined too, it should look like: Random rn = new Random(); int randomInt = rn.nextInt(10) + 1; Wondering why - 1 + 1

RandomInt and If Else issue

5 个答案: