how to check char is uppercase in java code example

Example 1: how to make a char uppercase in java

char q = Character.toUpperCase('d');

Example 2: java check string contains uppercase character

public boolean containsUpperCaseLetter(String s){
	for(int i=0;i<s.length();i++){
    	if(Character.isUpperCase(s.charAt(i))){
        	return true;
        }
    }
	return false;
}