public class StringReplaceEmp {
public static void main ( String args [ ] ) {
String str = " Hello World " ;
System . out . println ( str . replace ( ' H ' , ' W ' ) ) ;
System . out . println ( str . replaceFirst ( " He " , " Wa " ) ) ;
System . out . println ( str . replaceAll ( " He " , " Ha " ) ) ;
}
}