Change Case

Java Programming

Java Programming Examples

/* Without using toLowerCase() or toUpperCase() */
import java.io.*;
import java.util.Scanner;

class ch_case {
	void upper_case(String text) {

		/* Convert string to character array */
		char textarr[] = text.toCharArray();
		for(int i = 0; i < textarr.length; i++) {
			if(textarr[i] >= 'a' && textarr[i] <= 'z')
				textarr[i] = (char) (textarr[i] - 32);
		}
		String temp = new String(textarr);
		System.out.println("In Uppercase:\n"+temp);
	}
										
	void lower_case(String text) {

		/* Convert string to character array */
		char textarr[] = text.toCharArray();
		for(int i = 0; i < textarr.length; i++) {
			if(textarr[i] >= 'A' && textarr[i] <= 'Z')
				textarr[i] = (char) (textarr[i] + 32);
		}
		String temp = new String(textarr);
		System.out.println("In Lowercase:\n"+temp);
	}
}

class changecase {
	public static void main(String args[ ]) {
		Scanner input = new Scanner(System.in);
		ch_case chc = new ch_case();
		System.out.println("Enter your String:");
		String text = input.nextLine();
		chc.upper_case(text);
		chc.lower_case(text);
	}
}


          /****** Output ******/
          

Enter your String:


Hello World


In Uppercase:


HELLO WORLD


In Lowercase:


hello world