How to Left-Align Output Using printf in Java?

How can I format my output to be left-aligned when using printf in Java?

System.out.printf("%-20s %d%n", "Apples", 5);

In Java, the `printf` method is used to format the output in a way that is easy to read. If you want to left-align text or numbers in your console output, you can achieve this by using a formatting specifier with a negative width. Below are the details on how to use left-alignment with the `printf` method effectively.

System.out.printf("%-15s %-10d%n", "Item", 42); // Outputs 'Item          42' left-aligned

Causes

• Understanding format specifiers in Java's printf method.
• Using negative numbers to denote left alignment.

Solutions

• Use the '-' flag in the format specifier to left-align strings or numbers.
• Specify the desired width directly after the '-' sign, followed by the data type.

Mistake: Not using the '-' sign in the format specifier results in right-alignment.

Solution: Always include the '-' sign to ensure left-alignment.

Mistake: Forgetting to specify the width of the field can cause unexpected formatting results.

Solution: Always define a width for consistent alignment.