Ошибка string cannot be converted to string

I tried taking input of a 6 by 6 matrix in java using the string split function when the string is input in the following way, and to print the matrix.

1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6

The output that I get is

Main.java:24: error: incompatible types: String[] cannot be converted to String
                                c[j] = b[i].split(" ");

my code:

import java.util.*;
import java.io.*;

class Solution {
    public static void main(String args[]) {
        Scanner s = new Scanner(System.in);
        int a[][] = new int[6][6];
        String b[] = new String[6];

        for (int i = 0; i < 6; i++) {
            b[i] = s.nextLine();
        }

        // initializing the 2d array a[][]
        for (int i = 0; i < 6; i++) {
            for (int j = 0; j < 6; j++) {
                String c[] = new String[6];
                c[j] = b[i].split(" ");
                a[i][j] = Integer.parseInt(c[j]);
            }
        }

        // printing the input array
        for (int i = 0; i < 6; i++) {
            for (int j = 0; j < 6; j++) {
                System.out.print("ta[i][j]t");
            }
        }
    }
}

pls, suggest how I can overcome this error

When we call split function of String return the String[]. So c[j] (which is of type String) can’t be equal to String[].

Below code should be replaced as:

// initializing the 2d array a[][]
for (int i = 0; i < 6; i++) {
    String[] c = b[i].split(" ");
    for (int j = 0; j < 6; j++) {
        a[i][j] = Integer.parseInt(c[j]);
    }
}

The return type of split() function is type of array. Because you are asking java to give me each value as separate which is separated by " " (space). So java will create an array of each value and returns you the array. For storing the array you need an variable of type array. here c represent an array, but c[j] represents an single index of the array.

You can change your code like:

for (int i = 0; i < 6; i++) {
    String c[] = b[i].split(" ");
    for (int k = 0; k < c.length; k++) {
        a[i][k] = Integer.parseInt(c[k]);
    }
}

The the inputs are integer and you are converting them to integer later, I would suggest you to take input as integer like below:

class Solution {
    public static void main(String args[]) {
        Scanner s = new Scanner(System.in);
        int a[][] = new int[6][6];

        for (int i = 0; i < 6; i++) {
            for (int j = 0; j < 6; j++) {
                a[i][j] = s.nextInt();
            }
        }

        // printing the input array
        for (int i = 0; i < 6; i++) {
            for (int j = 0; j < 6; j++) {
                System.out.print("ta[i][j]t");
            }
        }
    }
}

I’m taking a Java class for college, and was working on some given tasks. This is the code I wrote for it.

public class String
{
 public static void main(String[] args)
 {
  String city = "San Francisco";
  int stringLength = city.length();
  char oneChar = city.charAt(0);
  String upperCity = city.toUpperCase();
  String lowerCity = city.toLowerCase();

  System.out.println(city);
  System.out.println(stringLength);
  System.out.println(oneChar);
  System.out.println(upperCity);
  System.out.println();
  }
 }

which yielded these results

C:UserssamDocumentsJava>javac String.java
String.java:8: error: incompatible types: java.lang.String cannot be 
converted to String
          String city = "San Franciso";
                        ^
String.java:9: error: cannot find symbol
            int stringLength = city.length();
                                   ^
symbol:   method length()
location: variable city of type String
String.java:10: error: cannot find symbol
            char oneChar = city.charAt(0);
                               ^
symbol:   method charAt(int)
location: variable city of type String
String.java:11: error: cannot find symbol
            String upperCity = city.toUpperCase();
                                   ^
symbol:   method toUpperCase()
location: variable city of type String
String.java:12: error: cannot find symbol
            String lowerCity = city.toLowerCase();
                                   ^
symbol:   method toLowerCase()
location: variable city of type String
5 errors

I’ve tried searching for an answer but I didn’t really find anything that helps. Any help is appreciated, thanks.

asked Jan 26, 2018 at 9:19

Since your class is named String, unqualified type reference in String city is taken as reference to your own class.

Either rename the class to some other name, or you’ll have to write java.lang.String wherever you reference the «built-in» Java String class.

answered Jan 26, 2018 at 9:21

It is conflict between system class java.lang.String and your class named String. Rename your class String to say MyString, i.e. replace line:

public class String

with

public class MyString

And rename file String.java containing this class to MyString.java.

answered Jan 26, 2018 at 9:37

Good thing you spotted the error, right? So, uh, if you aren’t asking for help why are you posting here?

i’m wondering how to fix it haha

i need to have it displayed «couted» later