Type Class.forName and then 3 times tab:

jshell> Class.forName(
Signatures:
Class<?> Class<T>.forName(String className) throws ClassNotFoundException
Class<?> Class<T>.forName(String name, boolean initialize, ClassLoader loader) throws ClassNotFoundException
Class<?> Class<T>.forName(Module module, String name)

<press tab again to see documentation>
jshell> Class.forName(
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: index 889, length 889
at java.base/java.lang.String.checkIndex(String.java:3693)
at java.base/java.lang.AbstractStringBuilder.charAt(AbstractStringBuilder.java:351)
at java.base/java.lang.StringBuilder.charAt(StringBuilder.java:85)
at jdk.compiler/jdk.internal.shellsupport.doc.JavadocFormatter.reflow(JavadocFormatter.java:590)
at jdk.compiler/jdk.internal.shellsupport.doc.JavadocFormatter$FormatJavadocScanner.formatDef(JavadocFormatter.java:221)
at jdk.compiler/jdk.internal.shellsupport.doc.JavadocFormatter$FormatJavadocScanner.visitThrows(JavadocFormatter.java:203)
at jdk.compiler/com.sun.tools.javac.tree.DCTree$DCThrows.accept(DCTree.java:957)
at jdk.compiler/com.sun.source.util.DocTreeScanner.scan(DocTreeScanner.java:79)
at jdk.compiler/jdk.internal.shellsupport.doc.JavadocFormatter$FormatJavadocScanner.scan(JavadocFormatter.java:549)
at jdk.compiler/jdk.internal.shellsupport.doc.JavadocFormatter$FormatJavadocScanner.visitDocComment(JavadocFormatter.java:164)
at jdk.compiler/com.sun.tools.javac.tree.DCTree$DCDocComment.accept(DCTree.java:138)
at jdk.compiler/com.sun.source.util.DocTreeScanner.scan(DocTreeScanner.java:79)
at jdk.compiler/jdk.internal.shellsupport.doc.JavadocFormatter$FormatJavadocScanner.scan(JavadocFormatter.java:549)
at jdk.compiler/jdk.internal.shellsupport.doc.JavadocFormatter.formatJavadoc(JavadocFormatter.java:118)
at jdk.jshell/jdk.internal.jshell.tool.ConsoleIOContext$ExpressionJavadocTask.lambda$perform$0(ConsoleIOContext.java:789)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
at jdk.jshell/jdk.internal.jshell.tool.ConsoleIOContext$ExpressionJavadocTask.perform(ConsoleIOContext.java:795)
at jdk.jshell/jdk.internal.jshell.tool.ConsoleIOContext.complete(ConsoleIOContext.java:427)
at jdk.jshell/jdk.internal.jshell.tool.ConsoleIOContext$2.doComplete(ConsoleIOContext.java:153)
at jdk.internal.le/jdk.internal.org.jline.reader.impl.LineReaderImpl.expandOrComplete(LineReaderImpl.java:4302)
at jdk.internal.le/jdk.internal.org.jline.reader.impl.LineReaderImpl$1.apply(LineReaderImpl.java:3797)
at jdk.internal.le/jdk.internal.org.jline.reader.impl.LineReaderImpl.readLine(LineReaderImpl.java:665)
at jdk.internal.le/jdk.internal.org.jline.reader.impl.LineReaderImpl.readLine(LineReaderImpl.java:454)
at jdk.jshell/jdk.internal.jshell.tool.ConsoleIOContext.readLine(ConsoleIOContext.java:233)
at jdk.jshell/jdk.internal.jshell.tool.JShellTool.getInput(JShellTool.java:1254)
at jdk.jshell/jdk.internal.jshell.tool.JShellTool.run(JShellTool.java:1190)
at jdk.jshell/jdk.internal.jshell.tool.JShellTool.start(JShellTool.java:991)
at jdk.jshell/jdk.internal.jshell.tool.JShellToolBuilder.start(JShellToolBuilder.java:254)
at jdk.jshell/jdk.internal.jshell.tool.JShellToolProvider.main(JShellToolProvider.java:120)