Eclipse查看抽象方法实现触发BufferUnderflowException错误求助

这情况我之前也碰到过，大概率是Eclipse的JDT索引或者工作区配置损坏导致的，给你几个亲测有效的解决步骤：

1. 重建Eclipse Java索引 #

这是最常见的修复方式，索引损坏会导致JDT解析类信息时出错：

• 打开Eclipse，依次点击 Window > Preferences > Java > Index
• 点击Rebuild按钮，等待索引重建完成后重启Eclipse
• 重启后再尝试Ctrl悬停查看方法实现

2. 重新导入项目 #

如果项目的配置文件损坏，也会引发这类解析异常：

• 关闭Eclipse，找到你的项目目录，删除.classpath和.project两个配置文件
• 重新打开Eclipse，通过 File > Import > Existing Projects into Workspace 重新导入项目
• 导入完成后等待项目构建完成，再测试功能

3. 清理工作区.metadata目录（谨慎操作，先备份！） #

如果上面的方法都没用，可能是工作区的核心配置损坏了：

• 关闭Eclipse，找到你的工作区目录，找到.metadata文件夹
• 先把这个文件夹复制一份做备份（避免丢失工作区配置）
• 删除原.metadata文件夹，重新启动Eclipse
• 重新导入所有项目，配置好开发环境后再测试

4. 更新/降级Eclipse版本 #

如果是Eclipse自身的JDT组件bug导致的，尝试更换版本：

• 如果你用的是旧版本，升级到最新的稳定版Eclipse IDE for Java Developers
• 如果你是刚更新Eclipse后出现的问题，回退到之前能正常使用的版本

附上你提供的错误堆栈： #

!STACK 0 
java.nio.BufferUnderflowException 
at java.nio.CharBuffer.get(CharBuffer.java:688) 
at org.eclipse.jdt.internal.core.nd.db.Chunk.getChars(Chunk.java:325) 
at org.eclipse.jdt.internal.core.nd.db.LongString.getChars(LongString.java:116) 
at org.eclipse.jdt.internal.core.nd.java.NdMethodId.getSelector(NdMethodId.java:75) 
at org.eclipse.jdt.internal.core.nd.java.NdMethodId.isConstructor(NdMethodId.java:85) 
at org.eclipse.jdt.internal.core.nd.java.model.IndexBinaryType.createBinaryMethod(IndexBinaryType.java:387) 
at org.eclipse.jdt.internal.core.nd.java.model.IndexBinaryType.getMethods(IndexBinaryType.java:275) 
at org.eclipse.jdt.internal.core.ClassFileInfo.generateMethodInfos(ClassFileInfo.java:254) 
at org.eclipse.jdt.internal.core.ClassFileInfo.readBinaryChildren(ClassFileInfo.java:427) 
at org.eclipse.jdt.internal.core.ClassFile.buildStructure(ClassFile.java:112) 
at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:259) 
at org.eclipse.jdt.internal.core.SourceRefElement.generateInfos(SourceRefElement.java:107) 
at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:579) 
at org.eclipse.jdt.internal.core.BinaryType.getElementInfo(BinaryType.java:287) 
at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:302) 
at org.eclipse.jdt.internal.core.SearchableEnvironment.find(SearchableEnvironment.java:115) 
at org.eclipse.jdt.internal.core.SearchableEnvironment.findType(SearchableEnvironment.java:294) 
at org.eclipse.jdt.internal.core.CancelableNameEnvironment.findType(CancelableNameEnvironment.java:54) 
at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:151) 
at org.eclipse.jdt.internal.compiler.lookup.UnresolvedReferenceBinding.resolve(UnresolvedReferenceBinding.java:102) 
at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveType(BinaryTypeBinding.java:212) 
at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.superInterfaces(BinaryTypeBinding.java:1941) 
at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.superInterfaces(BinaryTypeBinding.java:1957) 
at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.getExactMethod(BinaryTypeBinding.java:1148) 
at org.eclipse.jdt.internal.compiler.lookup.Scope.findExactMethod(Scope.java:1259) 
at org.eclipse.jdt.internal.compiler.lookup.Scope.getMethod(Scope.java:2864) 
at org.eclipse.jdt.internal.compiler.ast.MessageSend.findMethodBinding(MessageSend.java:934) 
at org.eclipse.jdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:757) 
at org.eclipse.jdt.internal.compiler.ast.Expression.resolve(Expression.java:1026) 
at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolveStatements(AbstractMethodDeclaration.java:634) 
at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.resolveStatements(MethodDeclaration.java:306) 
at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclaration.java:544) 
at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1195) 
at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1308) 
at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:605) 
at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:1030) 
at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:1075) 
at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:205) 
at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:271) 
at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.makeConsistent(ReconcileWorkingCopyOperation.java:191) 
at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.executeOperation(ReconcileWorkingCopyOperation.java:90) 
at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:724) 
at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:790) 
at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1250) 
at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1211) 
at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReconcilingStrategy.java:135) 
at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.access$0(JavaReconcilingStrategy.java:110) 
at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy$1.run(JavaReconcilingStrategy.java:90) 
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)

内容的提问来源于stack exchange，提问作者Amrit Kr Lama