What are the characteristics and functions of the finally keyword in java

What are the characteristics of the finally keyword?

The statement body controlled by finally will definitely be executed.

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Special case: jvm exited before execution to finally (such as System.exit(0)).

What is the function of finally keyword?

The function of finally is to release resources, which can be seen in IO stream operations and database operations.

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Example:

package com.heima.exception;

public class Demo07_Finally {

	public static void main(String[] args) {
		try {
			System.out.println(10/0);
		} catch (Exception e) {
			System.out.println("除数为零了");
			System.exit(0);								//退出jvm虚拟机
			// return语句相当于是方法的最后一口气，那么在他将死之前会看一看有没有
			// finally帮其完成遗愿，如果有就将finally执行后在彻底返回。
			return;
		} finally {
			System.out.println("看看我执行了吗");
		}
	}
}

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