Java String toUpperCase() method is used to convert all the characters of the String into upper case.
Syntax
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public String toUpperCase() public String toUpperCase(Locale locale) |
Returns
It returns upper case String.
Java String toUpperCase() Example 1:
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public class JavaStringtoUpperCaseEx1 { public static void main(String args[]) { String S1 = new String("lowercase converted to uppercase "); //Convert to UpperCase System.out.println(S1.toUpperCase()); } } |
Output:
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LOWERCASE CONVERTED TO UPPERCASE |
Java String toUpperCase() Example 2:
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public class JavaStringtoUpperCaseEx2 { public static void main(String[] args) { String str = " tutorial and example "; System.out.println(str.toUpperCase()); } } |
Output:
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TUTORIAL AND EXAMPLE |
Java String toUpperCase() Example 3:
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public class JavaStringtoUpperCaseEx3 { public static void main(String[] args) { String str = "tutorialandexample"; String str2 = "TUTORIALANDEXAMPLE"; System.out.println(str.toUpperCase().equals(str2)); } } |
output:
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true |
Java String toUpperCase(Locale locale) Method Example 4:
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import java.util.Locale; public class JavaStringtoUpperCaseEx4 { public static void main(String args[]) { String s = "you love python, but i love java."; // Locales with the language "tr" for TURKISH //"en" for ENGLISH is created Locale TURKISH = Locale.forLanguageTag("tr"); Locale ENGLISH = Locale.forLanguageTag("en"); // converting string s to lowercase letter // using TURKISH and ENGLISH language String S1 = s.toUpperCase(TURKISH); String S2 = s.toUpperCase(ENGLISH); System.out.println("In turkish language: "+S1); System.out.println("In English language: "+S2); } } |
Output:
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In turkish language: YOU LOVE PYTHON, BUT ? LOVE JAVA. In English language: YOU LOVE PYTHON, BUT I LOVE JAVA. |