Start 18.3.2022

Rechner/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

Rechner/.gitignore

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+/bin/

Rechner/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Rechner</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

Rechner/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=17

Rechner/src/Node.java

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+
+public class Node<X> {
+	
+	public X content;	//Inhalt des Knoten
+	
+	public Node<X> left;	//linker Nachfolger
+	public Node<X> right;	//rechter nachfolger
+	
+	public Node(X _content) {	//Konstruktor
+		this.content = _content;
+	}
+	
+}

Rechner/src/Symbol.java

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+
+public class Symbol {
+
+	private String s;
+	
+	public Symbol(String _s) {
+		this.s = _s;
+	}
+	
+	public boolean istMal() {
+		if(this.s == "*") return true;
+		return false; //return s == "*"; geht auch statt if
+	}
+	
+	public boolean istPlus() {
+		return s == "+";
+	}
+}