Java Printf Help in formating

Question

void catalog()
    {
        System.out.printf("\n%-5s%-5s%-15s%-15s%-6s%-15s%-5d\n",
            "Sno.","B.No.","BOOK-NAME","AUTHOR-NAME","COPIES","PUBLISHER","PRICE");
        for(int i=1;i<53;i++)
            System.out.print("-");
        System.out.println();
        for(int i=0;i<nob;i++)
            System.out.printf("%-5d%-5d%-15s%-15s%-5d%-10s%-10d\n",
                (i+1),bno[i],bname[i],author[i],availcopies[i],publisher[i],price[i]);
        for(int i=1;i<53;i++)
            System.out.print("-");
        System.out.println();
    }

i have this question with using printf in java, so this is the error i get with printf

java.util.MissingFormatArgumentException: Format specifier '%-15s'
    at java.util.Formatter.format(Formatter.java:2519)
    at java.io.PrintStream.format(PrintStream.java:970)
    at java.io.PrintStream.printf(PrintStream.java:871)
    at Library.catalog(LibrarySystem.java:162)
    at LibrarySystem.main(LibrarySystem.java:218)

What is that you want to do? – Uma Kanth Nov 07 '15 at 13:37 — Uma Kanth, Nov 07 '15 at 13:37
i want to print a table with details of the array – haribo komari Nov 07 '15 at 13:43 — haribo komari, Nov 07 '15 at 13:43
Try using `-%s` instead of `%-s` – Uma Kanth Nov 07 '15 at 13:45 — Uma Kanth, Nov 07 '15 at 13:45
do i have to change entire prinf statement – haribo komari Nov 07 '15 at 13:52 — haribo komari, Nov 07 '15 at 13:52

score 0 · Answer 1 · answered Nov 07 '15 at 14:19

This

System.out.printf("\n%-5s%-5s%-15s%-15s%-6s%-15s%-5d\n",
    "Sno.","B.No.","BOOK-NAME","AUTHOR-NAME","COPIES","PUBLISHER","PRICE");

will not work because the last is a number and you pass it the string "PRICE".

You should use different format string for the columns names.

Column names : "\n%-5s%-5s%-15s%-15s%-6s%-15s%-5s\n"

score 0 · Accepted Answer · answered Nov 07 '15 at 14:33

Change the line

System.out.printf("\n%-5s%-5s%-15s%-15s%-6s%-15s%-5d\n",
            "Sno.","B.No.","BOOK-NAME","AUTHOR-NAME","COPIES","PUBLISHER","PRICE");

to

System.out.printf("\n%-5s%-5s%-15s%-15s%-6s%-15s%-5s\n",
            "Sno.","B.No.","BOOK-NAME","AUTHOR-NAME","COPIES","PUBLISHER","PRICE");

because the last part %-5d\n" will try to get int value but you want to print a string i.e. "PRICE"

Rest is fine.

Simple mistake

Java Printf Help in formating

2 Answers2