捕获异常和抛出异常
package com.zishi.exception;
public class Test {
public static void main(String[] args) {
int a = 1;
int b = 0;
//假设要捕获多个异常:从小到大
try{ //try监控区域
System.out.println(a/b);
}catch (Error e){ //catch(想要捕获的异常类型) 捕获异常
System.out.println("Error");
}catch (Exception e){
System.out.println("Exception");
}catch (Throwable e){
System.out.println("Throwable");
}finally {
System.out.println("finally");
}
//finally 可以不要finally 最后可以关闭资源,IO
}
public void a(){
b();
}
public void b(){
a();
}
}
package com.zishi.exception;
public class Test2 {
public static void main(String[] args) {
//快捷键:ctrl + alt +t 先选中 异常快捷键
try {
new Test2().test2(1,0);
} catch (Exception e) {
e.printStackTrace();
} finally {
}
}
//假设这方法中,处理不了这个异常。方法上抛出异常
public void test2(int a,int b) throws ArithmeticException{
if(b==0){ //throw throws
throw new ArithmeticException(); //主动的抛出异常,一般在方法中使用
}
}
}