SKSKSK

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/Calculator.java

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+
+public class Calculator {
+Node<Symbol> erzeugeBeispielBaum() {
+	 Node<Symbol> root = new Node<Symbol>(new Symbol("+")); 
+root.left = new Node<Symbol>(new Symbol("3")); 
+root.right = new Node<Symbol>(new Symbol("*")); 
+root.right.left = new Node<Symbol>(new Symbol("8")); 
+return root; 
+
+
+}
+}

Rechner/src/Node.java

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+
+public class Node<T> {
+public T content; 
+public Node<T> left; 
+public Node<T> right; 
+
+public Node(T _content) {
+	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() {
+	return s == "x"; 
+}
+public boolean istPlus() {
+	return s == "+"; 
+}
+public boolean istOperator() {
+	return istPlus() || istMal(); 
+}
+public boolean istZhal()  {
+	return !istOperator(); 
+}
+public int getInt() {
+	return Integer.parseInt(s); 
+}
+
+}

Rechner/src/Test.java

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+
+public class Test {
+
+	public static void main(String[] args) {
+	Calculator c = new Calculator(); 
+	Node<Symbol> root = c.erzeugeBeispielBaum(); 
+
+	}
+
+}