Why should exceptions be used cautiously in Java

This article is about why exceptions need to be used with caution in Java. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Use anomalies with caution

In Java software development, try-catch is often used for error trapping, but try-catch statements are very bad for system performance. Although the loss of performance can not be detected in a try-catch, once try-catch is applied to the loop, it will bring great harm to the system performance.

The following is an example of applying try-catch to a for loop

Public void test () {int a = 0; for (int I = 0; I < 1000000; iTunes +) {try {a = a + 1; System.out.println (I);} catch (Exception e) {e.printStackTrace () }

The running time of this code is 27211 ms. If you move try-catch to extracorporeal circulation, you can improve system performance, as shown in the following code

Public void test () {int a = 0; try {for (int I = 0; I < 1000000; iTunes +) {a = a + 1; System.out.println (I);}} catch (Exception e) {e.printStackTrace ();}}

It takes 15647 ms to run. The influence of tyr-catch on system performance can be seen.

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