- **Unchecked异常(RuntimeException)**:如`NullPointerException`,不强制处理,通常由代码逻辑错误导致。3. **抛出异常**: - `throw`在方法内部手动抛出异常对象。 - `throws`在方法声明中标明可能抛出的异常类型,强制调用者处理或继续声明。4. **异常传播**:未处理的异常沿调用栈向上传递,直至被捕获或导致程...
异常处理(Exception Handling)是程序在运行时检测和处理错误或异常情况的过程。Java中的异常处理机制主要包括try-catch-finally块、throw关键字抛出异常、throws关键字声明异常以及异常分类(Checked和Unchecked异常)。 1. **异常处理的定义**:异常处理允许程序在遇到错误时继续执行或优雅终止,避免崩溃。它通过捕获、处理和...
1//"Done!" will be print out, but there is no "Got it."2publicclassTest {3publicstaticvoidmain(String[] args) {4try{5doSomething();6System.out.println("Done!");7}catch(RuntimeException e) {8System.out.println("Got it.");9}10}1112publicstaticvoiddoSomething() {13try{14thrownew...
Scanner input=newScanner(System.in);try{System.out.println("请输入第一个数字:");int num=input.nextInt();System.out.println("请输入第二个数字:");int num2=input.nextInt();System.out.println("结果:"+(num/num2));}catch(ArithmeticException e){System.out.println("除数不能为0");e.print...
参考链接: Java中ExceptionHandling方法重写 Java- Exceptions Handling 本文参考这里 三类异常: Checked exceptions:编译时可检查的异常Runtime exceptions:运行时异常Errors:发生错误 异常的体系(Exception Hierarchy) Throwable Exception IOExceptionRuntimeExceptionError ...
An exception is a problem that arises during the execution of a program. An exception can occur for many different reasons. Some of these exceptions are caused by user error, others by programmer error, and others by physical resources that have failed i
Example: Exception handling using try...catch classMain{publicstaticvoidmain(String[] args){try{// code that generate exceptionintdivideByZero =5/0; System.out.println("Rest of code in try block"); }catch(ArithmeticException e) {
{System.out.println("Releasing resources");}testException(15);}publicstaticvoidtestException(inti)throwsFileNotFoundException,IOException{if(i<0){FileNotFoundExceptionmyException=newFileNotFoundException("Negative Integer "+i);throwmyException;}elseif(i>10){thrownewIOException("Only supported for index...
System.out.println("发生空指针异常: " + e.getMessage()); } 在上面的例子中,我们尝试将字符串”abc”转换为整数,这会抛出一个NumberFormatException。如果字符串不能转换为整数,则可能会抛出NullPointerException。使用多个catch块可以分别处理这两种类型的异常。三、总结通过使用try-catch块和多个catch块,我们可以...
catch(ArithmeticException ae){ System.out.println("系统正在维护,请与管理员联系!"); ae.printStackTrace(); } finally { System.out.println("catch成功!"); } } } 运行结果如下: throw和throws的区别 throw: 1.throw是语句抛出一个异常 2.出现在函数体中 ...