How to change java version in macbook

最新推荐文章于 2025-04-01 20:17:11 发布
原创 最新推荐文章于 2025-04-01 20:17:11 发布 · 186 阅读 · 0 ·
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#java version

本文介绍了一种常见的情况：在Oracle官网安装了最新版Java之后，控制台中使用java-version命令显示的仍是旧版本。文章指出，这种情况通常是因为仅安装了JRE而非JDK。

 在oracle官网安装最新的java后，在控制台输入java -version一样显示的是旧版本的java

原因是安装的仅仅是JRE，只再安装JDK即可

mac下navicat连接出现2003_-_Can‘t_connect_to_MySQL_server_on_‘127.0.0.1‘_(61__Connection_refused_)
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简述 原来没这个情况，后来更新了Mac OS11后，会隔一段时间会出现.mac下navicat连接出现2003 - Can’t connect to MySQL server on ‘127.0.0.1’ (61 “Connection refused”) 前情提示 系统：Mac 12.1 mysql8 navicat 新建的库没这个问题，都是老的库，隔三差五出现。 一说 **最新版、完整版**请移步PUSDN  Powered By PUSDN - 平行宇宙软件开发者网www.pusdn.co
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又来一年一度的配置了-_-!!,最怕的就是配置了，这次要配置的是Qt mysql链接库，看网上教程发现大家配置的好溜，只有我一人出现各类问题！！ 咋们先查看下官文介绍 Embedded MySQL Server The MySQL embedded server is a drop-in replacement for the normal client library. With t...
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Mac使用时，怎么去除修改系统默认Java版本 流程方法 查看当前版本，终端输入 java -version 查看存在的java sdk版本 进入目录/Library/Java/JavaVirtualMachines 复制需要更改的java sdk所在目录更新使用版本 export JAVA_HOME=/Library/Java/JavaVirtualMachin...
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本周做了一个小项目，搭环境前装了jdk1.8，而导入依赖项目时，因为是用spring 3.2.0.Release版本做的，启动时报错如下：java.lang.IllegalArgumentExceptionat org.springframework.asm.ClassReader.(Unknown Source)at org.springframework.asm.ClassReader.(Un...
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Mac系统下修改Java的版本
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1.进入/Library/Java/JavaVirtualMachines目录，并且删除对应版本的JDK： “/Library/Java/JavaVirtualMachines/jdkmajor.minor.macro[_update].jdk” 例如，我们要删除的是8u6，可以执行： rm -rf jdk1.8.0_06.jdk 此时JDK 1.8就被删除了 2.去Oracle官网重新下载要安装的JDK版本，重新安装。例如，下载安装11.0.12版本，安装完成后执行java -version：
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MacBook安装Mysql Mysql官方下载地址: https://dev.mysql.com/downloads/mysql/ 官方下载 MySQL Community Server 社区版 选择对应的版本和系统下载: mysql-5.7.22-macos10.13-x86_64.dmg 点击安装 注意安装过程会弹出 密码 需要记住密码 在设置里最下面找到mysql 打开后启动，这里我把开机自动启动给去掉了 #Mysql命令添加到环境变量里 vim ~/.zshrc #最后加入 export MY
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didi@MacBook-Pro-5 gen4_production_test % git branch * dev-ota-merge-0903 master didi@MacBook-Pro-5 gen4_production_test % git remote add origin https://git.xiaojukeji.com/voyager-test-group/product-test/gen4_production_test.git error: remote origin already exists. didi@MacBook-Pro-5 gen4_production_test % git push -u origin HEAD:dev_ota_test To git.xiaojukeji.com:voyager-test-group/product-test/gen4_production_test.git ! [rejected] HEAD -> dev_ota_test (fetch first) error: failed to push some refs to 'git.xiaojukeji.com:voyager-test-group/product-test/gen4_production_test.git' hint: Updates were rejected because the remote contains work that you do hint: not have locally. This is usually caused by another repository pushing hint: to the same ref. You may want to first integrate the remote changes hint: (e.g., 'git pull ...') before pushing again. hint: See the 'Note about fast-forwards' in 'git push --help' for details. didi@MacBook-Pro-5 gen4_production_test % git pull origin dev_ota_test remote: Enumerating objects: 196, done. remote: Counting objects: 100% (53/53), done. remote: Compressing objects: 100% (23/23), done. remote: Total 196 (delta 39), reused 41 (delta 30), pack-reused 143 Receiving objects: 100% (196/196), 87.48 KiB | 914.00 KiB/s, done. Resolving deltas: 100% (125/125), completed with 12 local objects. From git.xiaojukeji.com:voyager-test-group/product-test/gen4_production_test * branch dev_ota_test -> FETCH_HEAD * [new branch] dev_ota_test -> origin/dev_ota_test hint: You have divergent branches and need to specify how to reconcile them. hint: You can do so by running one of the following commands sometime before hint: your next pull: hint: hint: git config pull.rebase false # merge hint: git config pull.rebase true # rebase hint: git config pull.ff only # fast-forward only hint: hint: You can replace "git config" with "git config --global" to set a default hint: preference for all repositories. You can also pass --rebase, --no-rebase, hint: or --ff-only on the command line to override the configured default per hint: invocation. fatal: Need to specify how to reconcile divergent branches. didi@MacBook-Pro-5 gen4_production_test % git pull origin dev_ota_test --rebase error: cannot pull with rebase: You have unstaged changes. error: please commit or stash them. didi@MacBook-Pro-5 gen4_production_test % git commit On branch dev-ota-merge-0903 Your branch is ahead of 'origin/dev-ota-merge-0903' by 5 commits. (use "git push" to publish your local commits) Changes not staged for commit: (use "git add <file>..." to update what will be committed) (use "git restore <file>..." to discard changes in working directory) modified: common_lib/web_lib/api_generate_ota_task.py no changes added to commit (use "git add" and/or "git commit -a") didi@MacBook-Pro-5 gen4_production_test % git add . didi@MacBook-Pro-5 gen4_production_test % git pull origin dev_ota_test --rebase error: cannot pull with rebase: Your index contains uncommitted changes. error: please commit or stash them. didi@MacBook-Pro-5 gen4_production_test % git commit -a Aborting commit due to empty commit message. didi@MacBook-Pro-5 gen4_production_test % git pull origin dev_ota_test --no-rebase From git.xiaojukeji.com:voyager-test-group/product-test/gen4_production_test * branch dev_ota_test -> FETCH_HEAD error: Your local changes to the following files would be overwritten by merge: common_lib/web_lib/api_generate_ota_task.py <stdin>:10: trailing whitespace. task_url, <stdin>:19: trailing whitespace. task_url, warning: 2 lines add whitespace errors. Merge with strategy ort failed. didi@MacBook-Pro-5 gen4_production_test % git add common_lib/web_lib/api_generate_ota_task.py didi@MacBook-Pro-5 gen4_production_test % git commit -m "feat: 添加 OTA 任务生成接口调用" [dev-ota-merge-0903 78aa496] feat: 添加 OTA 任务生成接口调用 1 file changed, 2 insertions(+), 2 deletions(-) didi@MacBook-Pro-5 gen4_production_test % git pull origin dev_ota_test --no-rebase From git.xiaojukeji.com:voyager-test-group/product-test/gen4_production_test * branch dev_ota_test -> FETCH_HEAD Auto-merging cases/ota_test/test_general_ota.py CONFLICT (content): Merge conflict in cases/ota_test/test_general_ota.py Auto-merging common_lib/web_lib/api_generate_ota_task.py CONFLICT (content): Merge conflict in common_lib/web_lib/api_generate_ota_task.py Automatic merge failed; fix conflicts and then commit the result. didi@MacBook-Pro-5 gen4_production_test % git pull origin dev_ota_test --no-rebase From git.xiaojukeji.com:voyager-test-group/product-test/gen4_production_test * branch dev_ota_test -> FETCH_HEAD Already up to date. didi@MacBook-Pro-5 gen4_production_test % git branch * dev-ota-merge-0903 master didi@MacBook-Pro-5 gen4_production_test % git push To git.xiaojukeji.com:voyager-test-group/product-test/gen4_production_test.git ! [rejected] dev-ota-merge-0903 -> dev-ota-merge-0903 (fetch first) error: failed to push some refs to 'git.xiaojukeji.com:voyager-test-group/product-test/gen4_production_test.git' hint: Updates were rejected because the remote contains work that you do hint: not have locally. This is usually caused by another repository pushing hint: to the same ref. You may want to first integrate the remote changes hint: (e.g., 'git pull ...') before pushing again. hint: See the 'Note about fast-forwards' in 'git push --help' for details. didi@MacBook-Pro-5 gen4_production_test % git branch * dev-ota-merge-0903 master didi@MacBook-Pro-5 gen4_production_test % git switch dev_ota_test branch 'dev_ota_test' set up to track 'origin/dev_ota_test'. Switched to a new branch 'dev_ota_test' didi@MacBook-Pro-5 gen4_production_test % git branch dev-ota-merge-0903 * dev_ota_test master didi@MacBook-Pro-5 gen4_production_test % git push -u origin dev_ota_test branch 'dev_ota_test' set up to track 'origin/dev_ota_test'. Everything up-to-date didi@MacBook-Pro-5 gen4_production_test % git branch dev-ota-merge-0903 * dev_ota_test master didi@MacBook-Pro-5 gen4_production_test % git add . didi@MacBook-Pro-5 gen4_production_test % git commit -m "提交机器人通知优化以及报文录制等" On branch dev_ota_test Your branch is up to date with 'origin/dev_ota_test'. nothing to commit, working tree clean didi@MacBook-Pro-5 gen4_production_test % git push Everything up-to-date didi@MacBook-Pro-5 gen4_production_test % git branch dev-ota-merge-0903 * dev_ota_test master didi@MacBook-Pro-5 gen4_production_test % git revert -m 1 HEAD [dev_ota_test 1564867] Revert "增加日志打印" 2 files changed, 1 insertion(+), 2 deletions(-) didi@MacBook-Pro-5 gen4_production_test % git log --oneline 1564867 (HEAD -> dev_ota_test) Revert "增加日志打印" a44efa5 (origin/dev_ota_test) 增加日志打印 501b72f 优化OTA前的磁盘空间清理 e5f7c7f voyager OTA前重启voy-ota,无需重启ACU df4c8a2 更新80101树莓派ip f0d3d5b voyager OTA前重启ACU 63f462d fix bug, 去掉注释,否则mdhil读不到version变量 09cceed Merge branch 'master' into dev-add_region_switch f53290a 解决空格引起的版本下载失败问题 a3d21f8 调整代码到lib dc7239f 增加改region代码 03a802a Merge branch 'master' into dev-add_region_switch b064d42 调试issue流程 e930019 切region自动化 097bfdd 服务器ip地址变更 b26a282 安装包文件增加匹配编译平台 bc1ee2a 调整升级方式为voy-ota-from-gift : a44efa5 (origin/dev_ota_test) 增加日志打印 501b72f 优化OTA前的磁盘空间清理 e5f7c7f voyager OTA前重启voy-ota,无需重启ACU df4c8a2 更新80101树莓派ip f0d3d5b voyager OTA前重启ACU 63f462d fix bug, 去掉注释,否则mdhil读不到version变量 09cceed Merge branch 'master' into dev-add_region_switch f53290a 解决空格引起的版本下载失败问题 a3d21f8 调整代码到lib dc7239f 增加改region代码 03a802a Merge branch 'master' into dev-add_region_switch b064d42 调试issue流程 e930019 切region自动化 097bfdd 服务器ip地址变更 b26a282 安装包文件增加匹配编译平台 bc1ee2a 调整升级方式为voy-ota-from-gift : a44efa5 (origin/dev_ota_test) 增加日志打印 501b72f 优化OTA前的磁盘空间清理 e5f7c7f voyager OTA前重启voy-ota,无需重启ACU df4c8a2 更新80101树莓派ip f0d3d5b voyager OTA前重启ACU 63f462d fix bug, 去掉注释,否则mdhil读不到version变量 09cceed Merge branch 'master' into dev-add_region_switch f53290a 解决空格引起的版本下载失败问题 a3d21f8 调整代码到lib dc7239f 增加改region代码 03a802a Merge branch 'master' into dev-add_region_switch b064d42 调试issue流程 e930019 切region自动化 097bfdd 服务器ip地址变更 b26a282 安装包文件增加匹配编译平台 bc1ee2a 调整升级方式为voy-ota-from-gift 9c086b3 kill-onboard-teleassis 413559e is_perf_test 立即落盘 2e55884 Change 80101 raspberry ip 2f6ca8a fenggaofeng:替换 apt install方式为 voy-ota-from-gift 4e13464 fenggaofeng:重启x86方式兼容A样和B样以及C样，不再需要单独切分支进行测试 c8526f6 Merge branch 'master' of git.xiaojukeji.com:voyager-test-group/product-test/gen4_production_test into dev_gen4_b_sp _reboot f601c35 fenggaofeng:lite_hil 碰撞节点增加perf flag,rtm、semantic、e2e增加启动动作。 bb9cf28 Merge branch 'master' of git.xiaojukeji.com:voyager-test-group/product-test/gen4_production_test into dev_gen4_b_sp: dc7239f 增加改region代码 03a802a Merge branch 'master' into dev-add_region_switch b064d42 调试issue流程 e930019 切region自动化 097bfdd 服务器ip地址变更 b26a282 安装包文件增加匹配编译平台 bc1ee2a 调整升级方式为voy-ota-from-gift 9c086b3 kill-onboard-teleassis 413559e is_perf_test 立即落盘 2e55884 Change 80101 raspberry ip 2f6ca8a fenggaofeng:替换 apt install方式为 voy-ota-from-gift 4e13464 fenggaofeng:重启x86方式兼容A样和B样以及C样，不再需要单独切分支进行测试 c8526f6 Merge branch 'master' of git.xiaojukeji.com:voyager-test-group/product-test/gen4_production_test into dev_gen4_b_sp_reboot f601c35 fenggaofeng:lite_hil 碰撞节点增加perf flag,rtm、semantic、e2e增加启动动作。 bb9cf28 Merge branch 'master' of git.xiaojukeji.com:voyager-test-group/product-test/gen4_production_test into dev_gen4_b_sp didi@MacBook-Pro-5 gen4_production_test % 帮我看一下是哪步将代码提交了我合并冲突之后原来的代码不见了想退回到原来的代码上
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