How to quickly align in java

Methods to achieve text alignment in Java include: using the String.format() method to specify the alignment, text width and type; using the DecimalFormat class to format and align numbers; using StringBuilder to dynamically splice text and Control alignment.

Quickly align text in Java

Method 1: String.format()

Use the String.format() method to quickly align text. The format is as follows:

<code class="java">String.format("%<flags><width>.<precision>[type]string", object)</code>

where:

• ##: Specify the alignment, such as - (left-aligned) or (right-aligned)
• : Specify Minimum width of text
• <code>: Specifies the number of digits after the decimal point (only applicable to numeric types)</code> </li> <li>[type]<code>: Optional type specifier such as </code>d<code> (integer) or </code>s<code> (string) </code> </li> <li>string<code>: The string to align </code> </li> </ul> <p>Example: <strong></strong></p> <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false"><code class="java">String s = String.format("%-20s", "Hello World"); System.out.println(s); // 输出：Hello World (左对齐，总宽度为 20)</code>
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Method 2: DecimalFormat

For numbers, you can use

DecimalFormat Class to format and align text.

Example:

<code class="java">DecimalFormat df = new DecimalFormat("#,###.##");
String s = df.format(123456.789);
System.out.println(s); // 输出：123,456.79 (右对齐，小数点后保留两位)</code>

Method 3: StringBuilder

For situations where dynamic splicing of text is required, you can use

StringBuilder.

Example:

<code class="java">StringBuilder sb = new StringBuilder();
sb.append("Hello").append(" ").append("World");
String s = sb.toString();
System.out.println(s); // 输出：Hello World</code>

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