Java 中的 Currency toString()方法，带示例
原文:https://www . geesforgeks . org/currency-tostring-method-in-Java-with-examples/
Java 中 Currency 类的 toString() 方法用于检索该货币的货币代码，该货币代码实际上是字符串格式的 ISO 4217 官方货币代码
语法:
CURRENCY.toString()
参数:此方法不接受任何参数。
返回值:此方法返回货币的 ISO 4217 货币代码。
异常:如果调用了无效代码，该方法将抛出运行时错误。
下面的程序说明了 toString()方法的工作原理:
程序 1:
// Java Code to illustrate toString() method
import java.util.*;
public class Currency_Demo {
public static void main(String[] args)
{
// Creating a currency with the code
Currency curr_ency
= Currency.getInstance("INR");
// Getting the currency code
String currency_code
= curr_ency.toString();
System.out.println("Currency Code of India is: "
+ currency_code);
}
}
Output:
Currency Code of India is: INR
程序 2:
// Java Code to illustrate toString() method
import java.util.*;
public class Currency_Demo {
public static void main(String[] args)
{
// Creating a currency with the code
Currency curr_ency
= Currency.getInstance("USD");
// Getting the currency code
String currency_code
= curr_ency.toString();
System.out.println("Currency Code of USA is: "
+ currency_code);
}
}
Output:
Currency Code of USA is: USD
程序 3: 为无效的货币代码。
// Java Code to illustrate toString() method
import java.util.*;
public class Currency_Demo {
public static void main(String[] args)
{
try {
// Creating a currency with the code
Currency curr_ency = Currency.getInstance("USDA");
// Getting the currency code
String currency_code = curr_ency.toString();
System.out.println("Invalid Currency Code: "
+ currency_code);
}
catch (Exception e) {
System.out.println(e);
}
}
}
Output:
java.lang.IllegalArgumentException
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