illegal start of expression & class, interface, or enum expected

[silverq_82]

i face these 2 errors when compiling my codes. Both errors are from the codes below. Can anyone help? Thanks in advance!

Code:

private static void newGame() throws IOException
	{
		int size = 4;														//the length for the answer
    	char[] answer;														//answer of the game
    	char[] contents = {'0','1','2','3','4','5','6','7','8','9'};		//the characters appear in the answer
    
    	int max_trial = 10;													//max number of trial
    	int current_trial = 0;												//count the number of trial
    	int num_complete_correct = 0;										//number of correct characters in correct positions
    	int num_partial_correct = 0;										//number of correct characters in wrong positions
        
    	size = 4;															//initialize the answer
		answer = new char[size];
		Random ran = new Random();											//randomly generate the answer
		for(int i=0;i<size;i++){
	    	answer[i] = contents[ran.nextInt(contents.length)];
			}
    
    
    
    public boolean check_input(String input){
	
	if (input.length() != size){											// check input length
	    return false;
	}
	
	for(int i=0;i<input.length();i++){										//check input content
	    boolean contain = false;
	    for(int j=0;j<contents.length&&!contain;j++){
		if (input.charAt(i)==contents[j]){
		    contain = true;
		}
	    }
	    if (!contain){
		return false;
	    }
	}
	return true;
    }
    
    public boolean guess(String input){
	
	num_complete_correct = 0;												//initialize the variables
	num_partial_correct = 0;
	boolean[] match_input = new boolean[size];
	boolean[] match_answer = new boolean[size];
	for(int i=0;i<size;i++){
	    match_input[i] = false;
	    match_answer[i] = false;
	}
	int i,j;
	
	for(i=0;i<size;i++){													//check correct input in correct position
	    if (input.charAt(i) == answer[i]){
		num_complete_correct++;
		match_input[i] = true;
		match_answer[i] = true;
	    }
	}
	
	for(i=0;i<size;i++){													//check correct input in wrong position
	    if (match_input[i]){
		continue;
	    }
	    for(j=0;j<size;j++){
		if (match_answer[j]){
		    continue;
		}
		if (input.charAt(i)==answer[j]){
		    match_input[i] = true;
		    match_answer[j] = true;
		    num_partial_correct++;
		    break;
		}
	    }
	}
	current_trial++;
	if (current_trial >= max_trial)
	{
		return false;
	}
	else
	{
		return true;
	}
    }
    
    public int get_all_correct(){
	return num_complete_correct;
    }
    
    public int get_partial_correct(){
	return num_partial_correct;
    }
    
    public boolean complete(){
	return (num_complete_correct==size);
    }
    
    public void set_answer(String input){
	answer = input.toCharArray();
    }
    
    public String get_answer(){
	return String.valueOf(answer);
    }
    
	}

[hardwired]

Learning to format your code will help avoid/detect this kind of thing.

Code:

	private static void newGame() throws IOException
	{
		int size = 4;	//the length for the answer
	    	char[] answer;	//answer of the game
		//the characters appear in the answer
	    	char[] contents = {'0','1','2','3','4','5','6','7','8','9'};
    
    		int max_trial = 10;	//max number of trial
	    	int current_trial = 0;	//count the number of trial
		//number of correct characters in correct positions
    		int num_complete_correct = 0;
		//number of correct characters in wrong positions
	    	int num_partial_correct = 0;
        
 	   	size = 4;	//initialize the answer
		answer = new char[size];
		Random ran = new Random();											//randomly generate the answer
		for(int i=0;i<size;i++){
	    		answer[i] = contents[ran.nextInt(contents.length)];
		}
	}  // this curley brace ended up at the end (commented out)

    
    	public boolean check_input(String input){
		...
    
    public String get_answer(){
	return String.valueOf(answer);
    }
    
//	}  // closing brace of newGame method above

[silverq_82]

Hi, thanks for the reply. I've come across another problem. For this part of the code, is there any way that i can remove the dialog box. I just want to remove the JOption.showInputDialog box and create a simple output without the dialog box. Thanks in advance...

Code:

import javax.swing.JOptionPane;

public class GameInterface {

    // create a main() method that start the game
    // while not reach the max trial and not win the game
    //	    get input
    //	    process input
    //	    display result
    // display final result
    public static void main(String[] ags) {
	MasterMind mind = new MasterMind();
	String input;
	boolean finish = false;
	System.out.println("answer is " + mind.get_answer());
	while (!finish && !mind.complete()){
	    do{
		input = JOptionPane.showInputDialog("Guess?(size is "+mind.get_answer().length()+")");
	    }while(!mind.check_input(input));
	    finish = !mind.guess(input);
	    System.out.println("your input is "+input);
	    System.out.println("you have "+mind.get_all_correct()+" in correct position");
	    System.out.println("you have "+mind.get_partial_correct()+ " in wrong position");
	}
	if (mind.complete()){
	    System.out.println("Congratulation.");
	}else{
	    System.out.println("Game Over! Please try again");
	    System.out.println("The answer is " + mind.get_answer());
	}
    }
}

[levent]

You can obtain user input as follows if you want:

Code:

BufferedReader console = new BufferedReader (new InputStreamReader(System.in));
String input;

input = console.readLine();

[silverq_82]

Hey, thanks for the guidance... Btw, i have another question. I have these set of codes and i want to compare the random generated set of 5 numbers with user's input of 5 numbers. Not sure how to start. I'm stuck after prompting user to key in the 5 numbers. Below are the codes:-

Code:

private static void newGame() throws IOException
	{
		//Random generator
    	Random gen = new Random();
    	int num = gen.nextInt(9) + 1;
    	   	
		//Generate 5 non-duplicate numbers within an array
	   	int mixcount=1;
		int setcount=5;					
		int[] numbers = new int[5];		//declare and create array

			Random mix = new Random();
			for(int i = 0 ; i< numbers.length; i++)
		{
		boolean diff = false;		//generate non-duplicate numbers

			while (!diff)
			{
				numbers[i] = mix.nextInt(9);
				diff=true;
				for (int j=0 ; j < i ; j++)
					{
						if (numbers[i]==numbers[j])
						{
							diff = false;
							break;
						}
					}
			}
			System.out.print(numbers[i]+" "); //remove this after all is complete 
		}
		
		InputStreamReader isr = new InputStreamReader( System.in );		//Create an InputStreamReader using the standard input stream
    	BufferedReader stdin = new BufferedReader( isr );				//Create a BufferedReader using the InputStreamReader created
    		System.out.print( "Enter 5 numbers (1 to 9): " );
    		String input = stdin.readLine();							// Read a line of text from the user

[levent]

silverq_82, at least you can try to develop the game logic. As far as i see, you already collected the code segments needed. I think you should try combining them all yourself at least at this stage if you want to learn Java, programming .. whatever the course objective is.

Good luck.

[silverq_82]

erm... i tried a few ways of getting the codes to work but keep getting errors. Not sure if you could help me a little? Thanks. If you don't mind...

P.S. The part where i need to compare with user's input & random generated number.

[levent]

Keep the random numbers in an array. Keep user input in another array. Write a loop to compare each element from first array to the second one. If the purpose of the game is to print number of mismatches between these two lists, then define an integer variable and count the number of mismatches with this variable inside your loop.

[silverq_82]

Hi, once again, thanks for the info.

[levent]

No problem. Let us know if you cant solve an error..