JAVA

capitalize string java

String str = "hello world!";

// capitalize first letter
String output = str.substring(0, 1).toUpperCase() + str.substring(1);

// print the string
System.out.println(output);
// Hello world!

capitalize each word in string java

//You can user the WordUtils class from apache commons-text library
WordUtils.capitalize(str) 

uppercase string java

String var_name = "Jerry";
System.out.println(var_name.toUpperCase()); //JERRY

capitalize string java

String str = "java";
String cap = str.substring(0, 1).toUpperCase() + str.substring(1);