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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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