how to convert a string to UpperCase in java code example

Example 1: java uppercase

"Hello World".toUpperCase()

Example 2: uppercase java

string s="hello";
s = Character.toUpperCase(s.charAt(0)) + s.substring(1);
The output will be: Hello

Example 3: String toUpperCase() method in java

// java program to convert string into uppercase
public class StringToUppercaseDemo
{
   public static void main(String[] args)
   {
      String str = "flower brackets";
      System.out.println(str.toUpperCase());
   }
}

Example 4: java lower case to upper case

toUpperCase()