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Java Java Basics Getting Started with Java Strings, Variables, and Formatting

danny engels
danny engels
366 Points
Posted by danny engels
danny engels
366 Points

call the printf method on the console

i m not so clear what the mean whit printf methode

Name.java 
// I have setup a java.io.Console object for you named console
  String firstName = "danny";
  console.printf("my name is danny\n",firstName);

1 Answer

scribbles
scribbles
21,173 Points
scribbles
scribbles
21,173 Points

The printf method on the console object will print a formatted string to the console. You pass it a string which can contain placeholders that will be replaced by any values or variables that are passed in as arguments to the method.

For example:

// I have setup a java.io.Console object for you named console
String firstName = "Danny";
console.printf("%s can code in Java!", firstName);

Will print Danny can code in Java! to the console. The %s is a placeholder that will stand in for a string. Since it is the first (and in this case only) placeholder in the string, the first variable (which is firstName) will get placed into its spot.

We would use %s in this example because the variable we will be putting in its spot is a string. If it were an int data type we could use %d for 'decimal', or if it was a float data type we could use %f.