Loop through all letter and number possibilities?

[Mr.abe90]

What I mean is how do i make a loop in java that cycles through all possible combinations of letters and numbers (with a limit of course). Like have it start with 0 and next have it be 00, 000, 0000... And then after like 5 digits of zeros have a 1 added (00001) And continue on adding letters.

I realize it would take a very long time to list them all but i still want to know what the code would be like.

[sunde887]

We don't really write code for people, instead we help people out. Have you tried this yet? If so, why not post your code(with [code] tags [/code]) and any problems you are having.

[Mr.abe90]

I have this so far.

int z=0;
for(y=1;y<10;y++){

for(int x=1;x<=5;x++){
System.out.print("z");
}
z++}

Te error is ';' expected in "z++}"
it's probably a simple answer but I have not been coding in java for to long.

[JosAH]

I have this so far.

int z=0;
for(y=1;y<10;y++){

for(int x=1;x<=5;x++){
System.out.print("z");
}
z++}

Te error is ';' expected in "z++}"
it's probably a simple answer but I have not been coding in java for to long.

Not long enough: in Java statements are terminated by a semi colon; you forgot one and the compiler started to whine about it.

kind regards,

Jos

[Mr.abe90]

Not long enough: in Java statements are terminated by a semi colon; you forgot one and the compiler started to whine about it.

kind regards,

Jos

Well am I suppost to put the semi colon before the "}", after z++} or get rid of the "}"?

[JosAH]

Well am I suppost to put the semi colon before the "}", after z++} or get rid of the "}"?

Those curly brackets have to match; b.t.w. don't put that curly bracket there; put it on its own line like this:

int z=0;
for(y=1;y<10;y++){
   for(int x=1;x<=5;x++){
      System.out.print("z");
   }
   z++;
}

kind regards,

Jos

[Mr.abe90]

Those curly brackets have to match; b.t.w. don't put that curly bracket there; put it on its own line like this:

int z=0;
    for(y=1;y<10;y++){
       for(int x=1;x<=5;x++){
          System.out.print("z");
       }
       z++;
    }

kind regards,

Jos

These are the errors I get when i type that exact code.

Password.java:3: illegal start of type
for(y=1;y<10;y++){
^
Password.java:3: <identifier> expected
for(y=1;y<10;y++){
     ^
Password.java:3: ';' expected
for(y=1;y<10;y++){
      ^
Password.java:3: illegal start of type
for(y=1;y<10;y++){
          ^
Password.java:3: <identifier> expected
for(y=1;y<10;y++){
            ^
Password.java:3: ';' expected
for(y=1;y<10;y++){
             ^
Password.java:3: illegal start of type
for(y=1;y<10;y++){
              ^
Password.java:3: <identifier> expected
for(y=1;y<10;y++){
                ^
Password.java:3: ';' expected
for(y=1;y<10;y++){
                 ^
Password.java:4: illegal start of type
   for(int x=1;x<=5;x++){
   ^
Password.java:4: <identifier> expected
   for(int x=1;x<=5;x++){
      ^
Password.java:4: ';' expected
   for(int x=1;x<=5;x++){
       ^
Password.java:4: <identifier> expected
   for(int x=1;x<=5;x++){
            ^
Password.java:4: <identifier> expected
   for(int x=1;x<=5;x++){
                ^
Password.java:4: illegal start of type
   for(int x=1;x<=5;x++){
                  ^
Password.java:4: <identifier> expected
   for(int x=1;x<=5;x++){
                   ^
Password.java:4: ';' expected
   for(int x=1;x<=5;x++){
                    ^
Password.java:4: illegal start of type
   for(int x=1;x<=5;x++){
                     ^
Password.java:4: <identifier> expected
   for(int x=1;x<=5;x++){
                       ^
Password.java:4: ';' expected
   for(int x=1;x<=5;x++){
                        ^
Password.java:5: <identifier> expected
      System.out.print("z");
                      ^
Password.java:5: illegal start of type
      System.out.print("z");
                       ^
Password.java:7: class, interface, or enum expected
   z++;
   ^
Password.java:8: class, interface, or enum expected
}
^
24 errors

I have no idea what to do.

[Mr.abe90]

Ok, so i changed some things around and this is my complete code.

public class Project1 {
	public static void main(String[] args) {
		int z=0;
		for(y=1;y<10;y++){
			for(int x=1;x<=5;x++){
				System.out.print("z");
			}
			z++;
		}
	}
}

The errors are:

cannot find symbol
symbol  : variable y
		for(y=1;y<10;y++){
		    ^
		for(y=1;y<10;y++){
		        ^
		for(y=1;y<10;y++){
		             ^

[Fubarable]

The solution is already in your code: Look at the difference between the the x for loop that has no errors and the y for loop that has the errors.

[Mr.abe90]

I got a different code from someone else and it works great.

int i, j, k, m, n;
        String d1, d2, d3, d4, d5;
        String digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
         
        // First print 1-digit "numbers"
        for(i = 0; i < 36; i++){
            d1 = digits.substring(i, i+1 );
            System.out.println(d1);
        }
             
            System.out.println();
                            
        // Next, print 2-digit "numbers"
        for(i = 0; i < 36; i++){
            d1 = digits.substring(i, i+1 );
            for( j = 0; j < 36; j++ ) {
                d2 = d1 + digits.substring(j, j+1 );
                System.out.println(d2);
            }
        }
             
            System.out.println();
                 
        // Now print 3-digit "numbers"
        for(i = 0; i < 36; i++){
            d1 = digits.substring(i, i+1 );
            for( j = 0; j < 36; j++ ) {
                d2 = d1 + digits.substring(j, j+1 );
                for( k = 0; k < 36; k++ ) {
                    d3 = d2 + digits.substring(k, k+1 );
                    System.out.println(d3);
                }
            }
        }
                 
            System.out.println();
                 
        // Now print 4-digit "numbers"
        for(i = 0; i < 36; i++){
            d1 = digits.substring(i, i+1 );
            for( j = 0; j < 36; j++ ) {
                d2 = d1 + digits.substring(j, j+1 );
                for( k = 0; k < 36; k++ ) {
                    d3 = d2 + digits.substring(k, k+1 );
                    for( m = 0; m < 36; m++) {
                        d4 = d3 + digits.substring( m, m+1 );
                        System.out.println(d4);
                    }
                }
            }
        }
                 
            System.out.println();
                 
        // Finally, print 5-digit "numbers"
        for(i = 0; i < 36; i++){
            d1 = digits.substring(i, i+1 );
            for( j = 0; j < 36; j++ ) {
                d2 = d1 + digits.substring(j, j+1 );
                for( k = 0; k < 36; k++ ) {
                    d3 = d2 + digits.substring(k, k+1 );
                    for( m = 0; m < 36; m++) {
                        d4 = d3 + digits.substring( m, m+1 );
                        for( n = 0; n < 36; n++) {
                            d5 = d4 + digits.substring( n, n+1 );
                            System.out.println(d5);
                        }
                    }
                }
            }
        }

But Thanks For All Your Help!

[Fubarable]

Oh for the love of everything beautiful, at least figure out what you did wrong!

Again, what is the difference between this:

for (y=1;y<10;y++){ // causes errors

and this:

for ([b][color="red"]int[/color][/b] x=1;x<=5;x++){  // no errors

[Mr.abe90]

Oh for the love of everything beautiful, at least figure out what you did wrong!

Again, what is the difference between this:

for (y=1;y<10;y++){ // causes errors

and this:

for (int x=1;x<=5;x++){  // no errors

I know I did eventually figure to do just that.
Works fine now.