Bug 579512 - Internal error exporting plug-ins or features
Summary:Internal error exporting plug-ins or features
Status: RESOLVED FIXED
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| Alias: None
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| Product:PDE
| Classification:Eclipse Project
| Component:Build (show other bugs)
| Version:4.23
| Hardware:PC Windows 10
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| Importance: P3 normal (vote)
| Target Milestone:---
| Assignee:Vikas Chandra
| QA Contact:
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Reported: 2022-03-30 12:13 EDT by Gunnar Arndt
| Modified: 2022-05-17 07:46 EDT (History)
| CC List: 3 users (show)
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See
Also:
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Attachments Sample project without dependencies that fails to export (1.43 MB, application/x-zip-compressed)
2022-03-31 04:06 EDT, Gunnar Arndt
| no flags
| Details
| Eclipse sample plugin (4.63 KB, application/x-zip-compressed) 2022-04-05 10:31 EDT, Gunnar Arndt
| no flags
| Details
| Plain Java project with manifest (3.35 KB, application/x-zip-compressed) 2022-04-06 08:23 EDT, Gunnar Arndt
| no flags
| Details
| patch (910 bytes, patch) 2022-04-06 11:06 EDT, Vikas Chandra
| no flags
| Details | Diff
| Export Product error (30.35 KB, image/png) 2022-05-17 07:30 EDT, Jean-Pascal Laux
| no flags
| Details
| View All Add an attachment (proposed patch, testcase, etc.)
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Java NullPointerException: element cannot be mapped to a null key问题解决
旭东怪
已于 2022-03-16 15:03:24 修改
1536 收藏 1
于 2022-03-16 15:02:59 首次发布
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问题描述:
java.lang.NullPointerException: element cannot be mapped to a null key
问题分析:
1、使用Collectors.groupingBy()进行分组时,分组值存在null值。
List<String> strList = new ArrayList<>(Arrays.asList("11", "12", "13", null, null));
Map<String, List<String>> map = strList.stream().collect(Collectors.groupingBy(x -> x));解决办法:分组值为null时,默认值为空字符。
List<String> strList = new ArrayList<>(Arrays.asList("11", "12", "13", null, null));
Map<String, List<String>> map = strList.stream().collect(Collectors.groupingBy(x -> StrUtil.isEmpty(x) ? "" : x));