replace any char to a string in java

Question

I wrote a code in java to replace any charecter to a string:

public class NewClass1 {
    public static void main(String[] args) {
             char ch='D';       
        String str="laptop"; 
        ch = str + ch;      
        System.out.println(ch); 
    }
    
}

But it gives me error:

Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - incompatible types: java.lang.String cannot be converted to char
	at javastackoverflow.NewClass1.main(NewClass1.java:8)
C:\Users\Hp\AppData\Local\NetBeans\Cache\8.2\executor-snippets\run.xml:53: Java returned: 1
BUILD FAILED (total time: 1 second)

How can I solve this problem?

Answer 1

To add a charecter to the beginning, middle and end of a string in Java please insert, a char at the beginning and end of the string the simplest way is using string.You can try:

public class NewClass1 {
    public static void main(String[] args) {
             char ch='D';       
        String str="laptop"; 
        str = str + ch;      
        System.out.println(str); 
    }
    
}

You can also try:

public static void main(String[] args){
    String s1 = "laptop";
    s1 = s1.concat("D");
    System.out.println(s1);
  }
}