Java 中的 NumberFormat setCurrency()方法，示例
原文:https://www . geesforgeks . org/number format-set currency-method-in-Java-with-examples/
setCurrency() 方法是 java.text.NumberFormat 的内置方法，用于设置格式化货币值时该数字格式使用的货币。这不会更新数字格式使用的最小或最大分数位数。它会覆盖最初的货币。
语法:
public void setCurrency(Currency currency)
参数:该功能接受一个强制参数货币，指定要设置的货币。
返回值:该函数不返回任何内容，因此返回类型为 void。
错误和异常:该函数抛出两类异常，描述如下:
-
UnsupportedoperationException : If the number format class does not implement the currency format.
-
[T0】 NullPointerException 【T1] Thrown if the currency is empty.
下面是上述功能的实现:
程序 1 :
// Java program to implement
// the above function
import java.text.NumberFormat;
import java.util.Locale;
import java.util.Currency;
public class Main {
public static void main(String[] args)
throws Exception
{
NumberFormat nF
= NumberFormat.getNumberInstance();
// Initially currency
System.out.println("Initially Currency: "
+ nF.getCurrency());
// Currency set to US
nF.setCurrency(Currency
.getInstance(Locale.CANADA));
// Print the currency
System.out.println("Currency set as: "
+ nF.getCurrency());
}
}
输出:
Initially Currency: USD
Currency set as: CAD
程序二:
// Java program to implement
// the above function
import java.text.NumberFormat;
import java.util.Locale;
import java.util.Currency;
public class Main {
public static void main(String[] args)
throws Exception
{
try {
NumberFormat nF
= NumberFormat.getNumberInstance();
// Initially currency
System.out.println("Initially Currency: "
+ nF.getCurrency());
// Currency set to US
nF.setCurrency(null);
// Print the currency
System.out.println("Currency set as: "
+ nF.getCurrency());
}
catch (Exception e) {
System.out.println("Exception is: " + e);
}
}
}
输出:
Initially Currency: USD
Exception is: java.lang.NullPointerException
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