【Java】java类改变当前电脑亮度

 demo:

package com.ruoyi.dms.controller;

import org.springframework.web.bind.annotation.RestController;

import java.io.IOException;
import java.util.Scanner;

@RestController
public class BrightnessController {

    public static void setBrightness(int value) {
        if (value < 0 || value > 100) {
            throw new IllegalArgumentException("Brightness value must be between 0 and 100");
        }
        String command = String.format("powershell.exe (Get-WmiObject -Namespace root/wmi -Class WmiMonitorBrightnessMethods).WmiSetBrightness(1, %d)", value);
        ProcessBuilder processBuilder = new ProcessBuilder("cmd.exe", "/c", command);

        try {
            Process process = processBuilder.start();
            int exitCode = process.waitFor();
            if (exitCode == 10) {
                System.out.println("Brightness set to: " + value);
            } else {
                System.err.println("Error setting brightness. Exit code: " + exitCode);
            }
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.print("Enter brightness level (0-100) or 'exit' to quit: ");
            String input = scanner.nextLine();

            // 检查是否退出
            if (input.equalsIgnoreCase("exit")) {
                break;
            }

            try {
                int brightnessValue = Integer.parseInt(input);
                setBrightness(brightnessValue);
            } catch (NumberFormatException e) {
                System.err.println("Invalid input. Please enter a number between 0 and 100.");
            } catch (IllegalArgumentException e) {
                System.err.println(e.getMessage());
            }
        }

        scanner.close();
    }
}

 一、点击启动该类

二、输入要调试的亮度。我输 3 ，将电脑亮度调为3

结果：

调试成功

原文地址：https://blog.csdn.net/wjjjjxxxx/article/details/142611217

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