java - RandomInt 和 If Else 问题

Question

我是 Java 的新手，我反复尝试修复这个问题......我有三十个错误

* @(#)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!");
            }
    }
    }

运行时:

--------------------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

第一个问题是您在所有语句中都使用了 randomInt，但您定义了 rn。

所以编译器不知道randomInt是什么。

编辑:请修复该问题并发布更多错误。

另一个问题是你在random.nextInt(10 - ....) 语句。