First upload

.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Passwort</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>

.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=1.8
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.8
+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.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.8

src/GUI/lengthJInputdialog.java

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+package GUI;
+
+import java.text.ParseException;
+
+import javax.swing.Icon;
+import javax.swing.ImageIcon;
+import javax.swing.JOptionPane;
+
+public class lengthJInputdialog {
+	private static int lenght;
+	private static String lenghtString;
+	private static final int maxSize = 59;
+	Icon icon = new ImageIcon(GUI.lengthJInputdialog.class.getResource("Apps-password-icon.png"));
+
+	public int setLength() throws ParseException {
+		lenghtString = (String) JOptionPane.showInputDialog(null,
+				"Wie viele Zeichen soll dein Passwort haben ? (max. 58) ", "Passwort", JOptionPane.QUESTION_MESSAGE,
+				icon, null, null);
+		if (lenghtString == null) {
+			System.exit(0);
+		} else {
+			try {
+				lenght = Integer.parseInt(lenghtString);
+			} catch (Exception e) {
+				JOptionPane.showMessageDialog(null, lenghtString +" ist keine Zahl", "Error!!!",
+						JOptionPane.WARNING_MESSAGE, null);
+				System.exit(0);
+			}
+			if (lenght >= maxSize) {
+				JOptionPane.showMessageDialog(null, "Diese Zahl ist zu hoch!!!", "Error!!!",
+						JOptionPane.WARNING_MESSAGE, null);
+				System.exit(0);
+			}
+		}
+		return lenght;
+
+	}
+
+	public int getLenght() {
+		return lenght;
+	}
+}

src/GUI/passwordJMessageBox.java

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+package GUI;
+
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.text.ParseException;
+
+import javax.swing.Icon;
+import javax.swing.ImageIcon;
+import javax.swing.JFileChooser;
+import javax.swing.JFrame;
+import javax.swing.JOptionPane;
+
+
+public class passwordJMessageBox {
+	final JFileChooser fc = new JFileChooser();
+	Icon icon = new ImageIcon(GUI.lengthJInputdialog.class.getResource("Apps-password-icon.png"));
+	int dialogButton = JOptionPane.YES_NO_OPTION;
+	public String setPassword() throws ParseException{
+		GUI.lengthJInputdialog input = new lengthJInputdialog();
+		input.setLength();
+		final int length = input.getLenght();
+		//System.out.println(length);
+		final String pass = Main.Passwort.createPassword(length);
+		//System.out.println(pass);
+		return pass;}
+	public void showPassword() throws Exception{
+		final String password = setPassword();
+		JOptionPane.showMessageDialog(null, "Dein Passwort ist : \n"+ password, "Passwort",
+				JOptionPane.YES_NO_OPTION, icon);
+		int dialogResult = JOptionPane.showConfirmDialog (null, "Willst du das Passwort Speichern ?","Speichern ?",dialogButton);
+		if(dialogResult == JOptionPane.YES_OPTION){
+
+				JFrame frame = new JFrame("Datei Öffnen");
+				frame .setVisible(true);
+				frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+                JFileChooser saveFile = new JFileChooser();
+                int saveOption = saveFile.showSaveDialog(frame);
+                if(saveOption == JFileChooser.APPROVE_OPTION){
+                	String konto = (String) JOptionPane.showInputDialog(null, "Zu welchem Konto gehört das Passwort ?",
+            				"Passwort", JOptionPane.QUESTION_MESSAGE, icon, null, null);
+
+                    try{
+                        BufferedWriter fileWriter = new BufferedWriter(new FileWriter(saveFile.getSelectedFile().getPath(),/*append*/ true));
+                        fileWriter.append(konto+": " + password+"\n");
+                        fileWriter.close();
+                    }catch(Exception ex){
+
+                    }
+
+}}}}

src/GUI/passwortAbfage.java

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+package GUI;
+
+import java.awt.BorderLayout;
+import java.awt.Image;
+import java.awt.LayoutManager;
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+
+import javax.swing.Icon;
+import javax.swing.ImageIcon;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JOptionPane;
+import javax.swing.JPasswordField;
+
+public class passwortAbfage {
+	public void initialize() throws IOException {
+		Icon icon = new ImageIcon(GUI.lengthJInputdialog.class.getResource("Apps-password-icon.png"));
+		LayoutManager lm = new BorderLayout();
+		//Image imc = (Image) icon;
+		JFrame f = new JFrame("Passwort");
+		f.setVisible(true);
+		f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		//f.setIconImage(imc);
+		f.setAlwaysOnTop(true);
+		f.setAutoRequestFocus(true);
+		f.setSize(300, 200);
+		f.setLayout(lm);
+	JPasswordField pwf = new JPasswordField();
+		pwf.setEditable(true);
+		pwf.setVisible(true);
+		JLabel label = new JLabel();
+		label.setText("Gib dein Passwort ein");
+		File trys = new File("text.txt");
+
+		BufferedWriter fileWriter = new BufferedWriter(new FileWriter(trys));
+		fileWriter.write("0");
+		if(!trys.exists()){
+			fileWriter.write("0");
+		}
+		label.setVisible(true);
+		FileReader fr = new FileReader(trys);
+		BufferedReader br = new BufferedReader(fr);
+		String passwortVersuche = br.readLine();
+		if(Integer.parseInt(passwortVersuche) > 4){
+			JOptionPane.showMessageDialog(f, "Kontaktiere Tobin um dein Passwort Zurückzusetzen");
+			System.exit(0);
+		}
+		String text = "Das Passwort ist";
+		String eingabe = "";
+		File passwort = new File("passwort.txt");
+		int i = 1;
+		while(!passwort.exists()&&(i==1 )){
+			f.add(pwf,"Center");
+			label.setText("Gib ein neues passwort ein:");
+			f.add(label,"North");
+			String passwort1 = String.valueOf(pwf.getPassword());
+			label.setText("Nochmal");
+			String passwort2 = String.valueOf(pwf.getPassword());
+			if(passwort1 ==passwort2){
+				BufferedWriter fileWriterpassword = new BufferedWriter(new FileWriter("passwort.txt"));
+				if(!trys.exists()){
+					fileWriter.write(passwort1);
+				}
+				i = 0;
+				f.remove(label);
+				f.remove(pwf);
+				label.setText("");
+			}
+		}
+		f.add(pwf, "Center");
+		label.setText("Gib dein Passwort ein du hast noch "+(3- Integer.parseInt(passwortVersuche)+" Versuche"));
+		f.add(label, "North");
+		try{
+			eingabe = String.valueOf(pwf.getPassword());
+		}catch(Exception x){
+			x.printStackTrace();
+		}FileReader frp = new FileReader("passwort.txt");
+		BufferedReader brp = new BufferedReader(fr);
+		String passwortfile = br.readLine();
+		if(!eingabe.equals(passwortfile)){
+
+			int paswortInt = Integer.parseInt(passwortVersuche) +1;
+			fileWriter.write(paswortInt);
+			System.exit(0);
+		}
+
+	}
+
+}

src/Main/Passwort.java

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+package Main;
+
+import java.io.IOException;
+import java.security.SecureRandom;
+
+import GUI.passwordJMessageBox;
+import GUI.passwortAbfage;
+
+public class Passwort {
+
+	// private static final int length;
+
+	public static String createPassword(int length) {
+		final String allowedChars = "0123456789abcdefghijklmnopqrstuvwABCDEFGHIJKLMNOP!§$%&?*+#";
+		SecureRandom random = new SecureRandom();
+		StringBuilder pass = new StringBuilder(length);
+		for (int i = 0; i < length; i++) {
+			pass.append(allowedChars.charAt(random.nextInt(allowedChars.length())));
+			//System.out.println(pass.toString());
+
+		}
+		return pass.toString();}
+
+	public static void main(String[] args) throws Exception {
+		//GUI.passwortAbfage passwort = new passwortAbfage();
+		//passwort.initialize();
+		GUI.passwordJMessageBox output = new passwordJMessageBox();
+		output.showPassword();
+		System.exit(0);
+
+	}
+
+}