JDBC Browser

package de.fhro.gui.basic.uebung01;import java.awt.*;import java.awt.event.*;public class JDBCBrowser {	public static void main(String[] args) {		BrowserFrame frame = new BrowserFrame();		frame.setVisible(true);		frame.addWindowListener(new WindowAdapter(){			public void windowClosing(WindowEvent we){				System.exit(0);			}		});	}}class BrowserFrame extends Frame {	private BrowserView view;	public BrowserFrame() {		view = new BrowserView();		add(view);		super.pack();	}	public BrowserView getBrowserView() {		return view;	}}class BrowserView extends Panel {	private HeadingView heading;	private CenterView center;	private FooterView footer;	private ApplicationController controller;	public BrowserView() {		setLayout(new BorderLayout());		heading = new HeadingView();		center = new CenterView();		controller = new ApplicationController(center);		footer = new FooterView(controller);		add(heading, BorderLayout.NORTH);		add(center, BorderLayout.CENTER);		add(footer, BorderLayout.SOUTH);	}	public HeadingView getHeading() {		return heading;	}	public void setHeading(HeadingView heading) {		this.heading = heading;	}	public CenterView getCenter() {		return center;	}	public void setCenter(CenterView center) {		this.center = center;	}	public ApplicationController getController() {		return controller;	}	public void setController(ApplicationController controller) {		this.controller = controller;	}	public FooterView getFooter() {		return footer;	}	public void setFooter(FooterView footer) {		this.footer = footer;	}}class HeadingView extends Panel {	public HeadingView() {		setLayout(new FlowLayout());		Label driverLbl = new Label("Driver:");		TextField driverInput = new TextField("oracle.djbc.driver.OracleDriver");		Label dbLbl = new Label("Database:");		TextField dbInput = new TextField("jdbc:oracle:thin:@141.60.120.130:1521");		Label userLbl = new Label("User:");		TextField userInput = new TextField("system");		// sollte pw verstecken		Label passwordLbl = new Label("Password:");		TextField passwordInput = new TextField("manager");		add(driverLbl);		add(driverInput);		add(dbLbl);		add(dbInput);		add(userLbl);		add(userInput);		add(passwordLbl);		add(passwordInput);	}}class CenterView extends Panel {	private CenterPane pane1;	private CenterPane pane2;	public CenterView() {		setLayout(new GridLayout(0,1));		this.pane1 = new CenterPane("select * from article");		this.pane2 = new CenterPane();		add(pane1);		add(pane2);	}	public CenterPane getUpperPane() {		return pane1;	}	public CenterPane getLowerPane() {		return pane2;	}}class CenterPane extends ScrollPane {	private TextArea textArea;	public CenterPane() {		super(ScrollPane.SCROLLBARS_ALWAYS);		textArea = new TextArea("", 1, 1, TextArea.SCROLLBARS_NONE);		add(textArea);	}	public CenterPane(String defaultText) {		super(ScrollPane.SCROLLBARS_ALWAYS);		textArea = new TextArea(defaultText, 1, 1, TextArea.SCROLLBARS_NONE);		add(textArea);			}	public TextArea getTextArea(){		return this.textArea;	}}class FooterView extends Panel {	public FooterView(ApplicationController ac) {		setLayout(new FlowLayout(FlowLayout.CENTER));		Button connectBtn = new Button("Connect");		connectBtn.setActionCommand("connect");		connectBtn.addActionListener(ac);		Button infoBtn = new Button("DB-Info");		infoBtn.setActionCommand("info");		infoBtn.addActionListener(ac);		Button submitBtn = new Button("Submit");		submitBtn.setActionCommand("submit");		submitBtn.addActionListener(ac);		Button prepareBtn = new Button("Prepare");		prepareBtn.setActionCommand("prepare");		prepareBtn.addActionListener(ac);		Button executeBtn = new Button("Execute");		executeBtn.setActionCommand("execute");		executeBtn.addActionListener(ac);		Button commitBtn = new Button("Commit");		commitBtn.setActionCommand("commit");		commitBtn.addActionListener(ac);		Button rollbackBtn = new Button("Rollback");		rollbackBtn.setActionCommand("rollback");		rollbackBtn.addActionListener(ac);		add(connectBtn);		add(infoBtn);		add(submitBtn);		add(prepareBtn);		add(executeBtn);		add(commitBtn);		add(rollbackBtn);	}}class ApplicationController implements ActionListener {	private Panel theView;	public ApplicationController(Panel view) {		this.theView = view;	}	public void actionPerformed(ActionEvent e) {		if (e.getActionCommand().equals("connect")) {			TextArea x = ((CenterView)this.theView).getUpperPane().getTextArea();			TextArea y = ((CenterView)this.theView).getLowerPane().getTextArea();			String toBeCopied = x.getText();			y.setText(toBeCopied);		}		if (e.getActionCommand().equals("info")) {			System.out.println(e.getSource().toString());		}		if (e.getActionCommand().equals("submit")) {			System.out.println(e.getSource().toString());		}		if (e.getActionCommand().equals("prepare")) {			System.out.println(e.getSource().toString());		}		if (e.getActionCommand().equals("execute")) {			System.out.println(e.getSource().toString());		}		if (e.getActionCommand().equals("commit")) {			System.out.println(e.getSource().toString());		}		if (e.getActionCommand().equals("rollback")) {			System.out.println(e.getSource().toString());		}	}}