我们如何检查 Java 中是否发生下溢?
javaobject oriented programmingprogramming更新于 2025/6/29 13:32:17
当分配给变量的值小于该变量的最小允许值时，就会发生下溢。如果 Java 中发生下溢，JVM 不会抛出任何异常，程序员有责任处理下溢情况。
示例
public class UnderlowTest {
public static void main(String[] args) {
int num1 = -2147483648;
int num2 = -1;
System.out.println("Number 1: " + num1);
System.out.println("Number 2: " + num2);
long sum = (long)num1 + (long)num2;
if(sum < Integer.MIN_VALUE) {
throw new ArithmeticException("Underflow occurred!");
}
System.out.println("The sum of two numbers : " + (int)sum);
}
}
输出
Number 1: -2147483648 Number 2: -1 Exception in thread "main" java.lang.ArithmeticException: Underflow occurred! at UnderlowTest.main(UnderlowTest.java:9)
相关文章
有用资源
java 参考教程 - 该教程包含有关 java 的更多信息:https://www.cainiaomax.com/java/
