He wrote the class by hand, line by line, feeling like a scribe copying a lost manuscript. He added a JList of JTextArea objects as a cache to improve performance. He calculated the row height dynamically in the JTable 's prepareRenderer method.
Then he scrolled horizontally.
As he walked to his car in the empty parking lot, he realized something profound. In the age of React, Vue, and Flutter, with their reactive data binding and component-based architectures, he had just spent a whole day wrestling a 25-year-old UI toolkit into doing something as simple as wrapping text and aligning numbers. Java Swing - JTable Text Alignment And Column W...
The numbers were perfectly right-aligned. The dollar signs lined up like soldiers on parade. The quantities were crisp and flush to the right.
DefaultTableCellRenderer rightRenderer = new DefaultTableCellRenderer(); rightRenderer.setHorizontalAlignment(SwingConstants.RIGHT); for (int i = 0; i < table.getColumnCount(); i++) He ran the program. The numbers snapped to the right. A wave of relief washed over him. He leaned back, cracked his knuckles, and reached for his cold coffee. He took a sip. It was disgusting. He didn't care. Problem solved. He wrote the class by hand, line by
At 11:47 PM, with bloodshot eyes and trembling fingers, he compiled one last time.
He then discovered the DefaultTableCellRenderer . Aha! The standard tool for the job. He wrote a quick loop: Then he scrolled horizontally
The window appeared. The JTable loaded. He stared.
It wasn't modern. It wasn't glamorous. But when Lena saw the working table the next morning, her simple "Oh, that looks perfect" was the only reward he needed.
Simon's eye started to twitch. He missed dinner. He heard Lena leave, shouting "Good luck!" over her shoulder. He was alone with the JTable .
He learned about JTextArea . He learned that the default TableCellRenderer uses a JLabel , which does not wrap text. To wrap text, you need a JTextArea inside the cell. You need a custom TableCellRenderer that returns a JTextArea instead of a JLabel .