How to use the formatting method of java BigDecimal

1. Description

Take using BigDecimal to format currency and percentage as an example. First, create a BigDecimal object, perform BigDecimal arithmetic operations, and establish currency and percentage formatted references respectively. Finally, use the BigDecimal object as a parameter of the format() method to output its formatted currency value and percentage.

2. Example

    NumberFormat currency = NumberFormat.getCurrencyInstance(); //建立货币格式化引用
    NumberFormat percent = NumberFormat.getPercentInstance();  //建立百分比格式化引用
    percent.setMaximumFractionDigits(3); //百分比小数点最多3位
    
    BigDecimal loanAmount = new BigDecimal("15000.48"); //贷款金额
    BigDecimal interestRate = new BigDecimal("0.008"); //利率   
    BigDecimal interest = loanAmount.multiply(interestRate); //相乘
 
    System.out.println("贷款金额:\t" + currency.format(loanAmount));
    System.out.println("利率:\t" + percent.format(interestRate));
    System.out.println("利息:\t" + currency.format(interest));

What is Java

Java is an object-oriented programming language that can write desktop applications, Web applications, Distributed systems and embedded systems applications.

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