Metoda toUpperCase, toLowerCase dan replace Kelas String Di Java

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// Nama file : KonversiString.java
// Menggunakan metoda toUpperCase, toLowerCase dan replace
 
// Deklarasi kelas
public class KonversiString {
     
    public static void main(String[] args) {
 
      String str = "Belajar Java";
 
      String str1 = str.toUpperCase();
      String str2 = str.toLowerCase();
      String str3 = str.replace('a', 'e');
 
      System.out.println();
      System.out.println("str = " + str);
      System.out.println();
      System.out.println("str.toUpperCase() = " + str1);
      System.out.println("str.toLowerCase() = " + str2);
      System.out.println("str.replace('a', 'e') = " + str3);
   }
}