![]() |
Help: Working With Strings
Help is available for each task, or you can go straight to the solution source code.
The argument to the String constructor should be the expression "Hello" + " " + "World"
Or something equivalent.
Use the substring method, with the first argument 0, and the second anything less than or equal to the string's length. Task 3Create another "Hello World" string using a StringBuffer and its append method. Print it to System.out.Create a new StringBuffer variable, initialize it with a new StringBuffer. Use the StringBuffer method append to add the result string as separate pieces. Task 4Use concatenation to convert some integers and floating point numbers to a string for printing.Remember that '+' refers to concatenation only if its first argument is a String. Otherwise, the Java compiler thinks that + is for addition. A trick to use + for concatenation, but still have a number at the beginning of the string, is to start the expression off with "" +. Task 5As in the notes, use Integer.parseInt to convert a String into an Integer, then print it to System.out.Be sure that the String argument to parseInt is a legal integer, otherwise an exception will be raised. |
Copyright © 1996-1997 MageLang Institute. All Rights Reserved. |