How to align text?

[shifat96]

How should I align text to the right?

Here is a part from my code:

System.out.println (subj1 + "\t" + gradesubj1 + "%"); // Subject and Mark for Subject 1

I want to align the output for subj1 to the left.
I want to align the output for gradesubj1 and the rest to the left.

How should I do it?

[pbrockway2]

PrintStream (like System.out) also has a printf() method.

 
import java.util.Map;
import java.util.TreeMap;
 
public class PrintfEg {
    public static void main(String[] args) {
        Map<String,Double> data = new TreeMap<String,Double>() {
            {
                put("First", 2000.0);
                put("Second", Math.PI);
                put("Last", -1.0);
            }
        };
 
        for(Map.Entry<String,Double> entry :data.entrySet()) {
            System.out.printf("%-10s%8.3f%%%n", entry.getKey(), entry.getValue());
        }
    }
}

The format string, "%-10s%8.3f%%%n" determines how the output will appear. %-10s prints a left aligned string of width 10 and padded with spaces. %8.3f produces a floating point value, right aligned 8 characters wide with 3 decimal places. (Math.PI is suitably rounded). %% produces a % sign. And %n produces the newline character for the OS on which it runs.

There is much more to the use of these format strings with detail linked to from the API docs.

[shifat96]

Thank You!

[pbrockway2]

You're welcome.

There is probably too much detail in the format string syntax to try and remember. I tend to look things up as I need them. It's useful, though, because a similar formatting notation is used in a number of programming languages.

[keep smiling]

i got the same problem but i found help from this:

Java - printf - YouTube

i hope it helps you too