如下所示:
class Exc{
int a;
int b;
}
public class Except {
@SuppressWarnings("finally")
static int compute (){
Exc e = new Exc();
e.a = 10;
e.b = 10;
int res = 0 ;
try{
res = e.a / e.b;
System.out.println("try ……");
return res + 1;
}catch(NullPointerException e1){
System.out.println("NullPointerException occured");
}catch(ArithmeticException e1){
System.out.println("ArithmeticException occured");
}catch(Exception e3){
System.out.println("Exception occured");
}finally{
System.out.println("finnaly occured");
}
System.out.println(res);
return res+3;
}
public static void main(String[] args){
int b = compute();
System.out.println("mian b= "+b);
}
}
输出:
try ……
finnaly occured
mian b= 2
结论: 如果没有异常, 则执行try 中的代码块,直到 try 中的 return,接着执行 finally 中的代码块,finally 执行完后 , 回到try 中执行 return 。退出函数。
class Exc{
int a;
int b;
}
public class Except {
@SuppressWarnings("finally")
static int compute (){
Exc e = new Exc();
// e.a = 10;
// e.b = 10;
int res = 0 ;
try{
res = e.a / e.b;
System.out.println("try ……");
return res + 1;
}catch(NullPointerException e1){
System.out.println("NullPointerException occured");
}catch(ArithmeticException e1){
System.out.println("ArithmeticException occured");
}catch(Exception e3){
System.out.println("Exception occured");
}finally{
System.out.println("finnaly occured");
}
System.out.println(res);
return res+3;
}
public static void main(String[] args){
int b = compute();
System.out.println("mian b= "+b);
}
}
输出:
ArithmeticException occured
finnaly occured
0
mian b= 3
结论: 如果try 中有异常, 则在异常语句处,跳转到catch 捕获的异常代码块, 执行完 catch 后,再执行 finally ,跳出 try{}catch{}finally{} ,继续向下执行,不会去执行try中 后面的语句。
以上这篇finally 一定会执行(实例代码)就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持aitechtogether.com。