How to align output numbers in java

In Java, use the printf method to align numeric output. The format specifier %n specifies the minimum field width and is padded with spaces. %0n is padded with zeros. %-n is left-aligned. Numbers are right-aligned by default.

Align output numbers in Java

In Java, you can use the printf method to align Digital output. The printf method uses a format string to specify the format of the output data.

Alignment format

The following format specifiers can be used to align numeric output:

• %n : Specifies the minimum field width. If the number length is smaller than this width, it will be padded with spaces.
• %0n: Same as %n`, but padded with zeros.
• %-n: left-aligned numbers, by default numbers are right-aligned.

Sample Code

The following sample code demonstrates how to align numeric output:

// 对齐数字，最小字段宽度为 10，空格填充
System.out.printf("%10d", 1234); // 输出 "    1234"

// 对齐数字，最小字段宽度为 10，零填充
System.out.printf("%010d", 1234); // 输出 "000001234"

// 对齐数字，最小字段宽度为 10，左对齐
System.out.printf("%-10d", 1234); // 输出 "1234    "

Note:

• If the number length exceeds the specified minimum field width, the number will be output according to its original length.
• %n The format specifier does not apply to floating point output.

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