如何使用printf和對話框格式化輸出？

Question

使用Java，如何在對話框中顯示以下「格式化代碼」？

System.out.printf("%20s%20s%20.-5f%n%n", "Assessed Value:", "$", assessedValue); 
System.out.printf("%20s%20s%-5f%n%n", "Taxable Amount:", "$", taxedAmount); 
System.out.printf("%20s%20s%-5f%n%n", "Tax Rate for $100.00:", "$", taxDollars); 
System.out.printf("%20s%20s%-5f%n%n", "Property Tax:", "$", propertyTax); 

Answer 1

可以使用JOptionPane類在對話框的造型展現的消息。

那會是這樣的：

public void showDialog() { 
    String message = String.format("%20s%20s%20.-5f%n%n", "Assessed Value:", "$", assessedValue) + String.format("%20s%20s%-5f%n%n", "Taxable Amount:", "$", taxedAmount) + String.format("%20s%20s%-5f%n%n", "Tax Rate for $100.00:", "$", taxDollars) + String.format("%20s%20s%-5f%n%n", "Property Tax:", "$", propertyTax); 
    JOptionPane.showMessageDialog(null, message); 
} 

Source

Answer 2

內部，這些調用都只是用String.format，你可以用它來生成您的對話框的內容。