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You can use the toUpperCase() method on a String to convert any String to all uppercase.

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15y ago

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Does Java keywords are written in lowercase as well as uppercase?

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In Java you can invoke the toUpperCase()method on a string to convert it to a new string with all upper case characters.For example, "abc".toUpperCase() returns "ABC"Likewise, the static Character.toUpperCase(char ch) method takes a single character and returns the upper-case equivalent of that character (e.g. 'a' -> 'A').


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I'll just write a function to do that, I hope the good people won't try to run it as it is.... void function() { char c = 'a'; if( c >= 'a' && c <='z' ) System.out.println("LowerCase"); else if( c>='A' && c <='Z' ) System.out.println("UpperCase"); else System.out.println("Special Character"); }


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In Java toUppercase() is a method of the class String: https://docs.oracle.com/javase/7/docs/api/java/lang/String.html#toUpperCase()


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How to Uppercase the all vowels in Java?

Assuming that you want to uppercase only the vowels in a String, you can write a loop to go through all the chracters in a String and when a character is a vowel you can convert it to uppercase. I think one way to do this is as follows:String originalString = "aobxkijejku";StringBuffer buffer = newStringBuffer(originalString);for(int i = 0, len = originalString.length(); i < len; i++){if(buffer.charAt(i) 'u'){buffer.setCharAt(i, 'U');}}String modifiedString = buffer.toString();