flutter 초기 시작

  1.  flutter 다운로드
  2. 환경 변수 세팅
  3. flutter doctor


C:\flutter\bin\flutter.bat doctor --verbose

[√] Flutter (Channel stable, 3.24.4, on Microsoft Windows [Version 10.0.19045.5011], locale ko-KR)
    • Flutter version 3.24.4 on channel stable at C:\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 603104015d (3 weeks ago), 2024-10-24 08:01:25 -0700
    • Engine revision db49896cf2
    • Dart version 3.5.4
    • DevTools version 2.37.3

[√] Windows Version (Installed version of Windows is version 10 or higher)

[!] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at C:\Users\mycom20\AppData\Local\Android\sdk
    X cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.
    X Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/to/windows-android-setup for more details.

[!] Android toolchain - develop for Android devices (Android SDK version 35.0.0) [649ms]
    • Android SDK at C:\Users\mycom20\AppData\Local\Android\Sdk
    • Platform android-35, build-tools 35.0.0
    • ANDROID_HOME = C:\Users\mycom20\AppData\Local\Android\Sdk
    • Java binary at: C:\Program Files\Java\jdk-11\bin\java
      This JDK is specified in your Flutter configuration.
      To change the current JDK, run: `flutter config --jdk-dir="path/to/jdk"`.
    • Java version OpenJDK Runtime Environment 18.9 (build 11+28)
    X Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/to/windows-android-setup for more details.



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자바 string 비교 할때 equlas 를 사용하자

자바 string  비교 할때 equlas if(strA =="AA") 로 해놓고 프로그램 동작안한다고 기본 10분 이상은 잡아먹고 괜히 데이터들만 print 한다. .ㅠㅠ 이제 문자열 비교로 시간 낭비 하지 말자! ++ Tip :  equals 의 반대는!?!!? 바로  if(!string.equlas("문자열") ex )  if(!str1.equals("AA")){ System.out.println("AA가 아닙니다"); } 출처:  http://kmj1107.tistory.com/entry/JAVA-문자열string-비교-equals와-의-차이점-equals의-반대  [토순이네집]
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