Test
package exception.demo02;
public class Test {
public static void main(String[] args) {
int a = 1;
int b = 0;
try { //try 监控区域
if (b == 0) { //throw throws
throw new ArithmeticException();//主动抛出异常
}
System.out.println(a / b);
new Test().b();
// } catch (ArithmeticException e) { //catch(想要捕获的异常类型) 捕获异常
// } catch (Throwable e) {
// System.out.println("程序异常");
} catch (Error error) {
System.out.println("error");
} catch (Exception exception) {
System.out.println("exception");
} catch (Throwable throwable) {
System.out.println("throwable");
} finally { //finally 处理善后工作
System.out.println("finally");
}
// 要捕获多个异常,需从小到大去捕获;
// System.out.println(a / b);//Exception in thread "main" java.lang.ArithmeticException: / by zero
//调用test方法
System.out.println( "----------调用test方法--------");
// new Test().test(1,0);
// 在方法上招聘的异常,需捕获,ctrl+alt+t
System.out.println( "----------调用test方法 在方法上招聘的异常--------");
try {
new Test().test(1,0);
} catch (ArithmeticException e) {
e.printStackTrace();
} finally {
}
}
public void a() {
b();
}
public void b() {
a();
}
//假设在这个方法中处理不了这个异常,可以在方法中抛出;
public void test(int a,int b)throws ArithmeticException{
if (b == 0) { //throw throws
throw new ArithmeticException();//主动抛出异常,一般在方法中使用;
}
System.out.println(a / b);
}
}
运行结果
![](https://img2020.cnblogs.com/blog/1868218/202108/1868218-20210803231708202-1903527349.png)
Test2
package exception.demo02;
public class Test2 {
public static void main(String[] args) {
int a = 10;
int b = 0;
// 选中内容;如:选中他“System.out.println(a / b);” ctrl + alt + t =======>自动生成异常代码块
try {
System.out.println(a / b);
} catch (Exception e) {
System.exit(0); //结束程序
e.printStackTrace();//打印错误的栈信息
/*
java.lang.ArithmeticException: / by zero
at exception.demo02.Test2.main(Test2.java:11)
*/
}
}
}