ScrollPane java swing

Version imprimable

Bonjour, je veux créer une interface avec un scrollPane mais je n'arrive pas à faire fonctionner le scrollpane, j'ai besoin de votre aide.
Voici mon code

Code:

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import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridLayout;
 
import javax.swing.JFrame;
import javax.swing.JPanel;
 
import java.awt.BorderLayout;
 
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JButton;
 
public class TestScroll {
 
	private JFrame frame;
	private JTextField textField;
	private JTextField textField_1;
	private JTextField textField_2;
	private JTextField textField_3;
	private JTextField textField_4;
	private JTextField textField_5;
	private JTextField textField_6;
	private JTextField textField_7;
	private JTextField textField_8;
	private JTextField textField_9;
 
	/**
         * Launch the application.
         */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					TestScroll window = new TestScroll();
					window.frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}
 
	/**
         * Create the application.
         */
	public TestScroll() {
		initialize();
	}
 
	/**
         * Initialize the contents of the frame.
         */
	private void initialize() {
		frame = new JFrame();
		frame.setBounds(100, 100, 1327, 748);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
 
 
		JPanel panel = new JPanel();
		frame.getContentPane().add(panel, BorderLayout.CENTER);
		panel.setLayout(null);
 
		JTextArea textArea = new JTextArea();
		textArea.setBounds(403, 100, 746, 536);
		panel.add(textArea);
 
		JButton btnNewButton = new JButton("New button");
		btnNewButton.setBounds(800, 760, 119, 20);
		panel.add(btnNewButton);
 
		JScrollPane scrollPane = new JScrollPane();
		scrollPane.setBounds(15, 235, 413, -225);
 
		panel.add(scrollPane);
 
		JLabel lblChamp = new JLabel("champ1");
		lblChamp.setBounds(15, 16, 69, 20);
		panel.add(lblChamp);
 
		JLabel lblChamp_1 = new JLabel("champ2");
		lblChamp_1.setBounds(15, 72, 69, 20);
		panel.add(lblChamp_1);
 
		textField = new JTextField();
		textField.setBounds(103, 13, 146, 26);
		panel.add(textField);
		textField.setColumns(10);
 
		textField_1 = new JTextField();
		textField_1.setBounds(99, 69, 146, 26);
		panel.add(textField_1);
		textField_1.setColumns(10);
 
		JLabel lblChamp_2 = new JLabel("champ3");
		lblChamp_2.setBounds(15, 128, 69, 20);
		panel.add(lblChamp_2);
 
		textField_2 = new JTextField();
		textField_2.setBounds(103, 125, 146, 26);
		panel.add(textField_2);
		textField_2.setColumns(10);
 
		JLabel lblChamp_3 = new JLabel("champ5");
		lblChamp_3.setBounds(15, 188, 69, 20);
		panel.add(lblChamp_3);
 
		textField_3 = new JTextField();
		textField_3.setBounds(103, 185, 146, 26);
		panel.add(textField_3);
		textField_3.setColumns(10);
 
 
 
		JLabel lblChamp_4 = new JLabel("champ6");
		lblChamp_4.setBounds(15, 257, 69, 20);
		panel.add(lblChamp_4);
 
		textField_4 = new JTextField();
		textField_4.setBounds(103, 254, 146, 26);
		panel.add(textField_4);
		textField_4.setColumns(10);
 
		JLabel lblChamp_5 = new JLabel("champ7");
		lblChamp_5.setBounds(15, 315, 69, 20);
		panel.add(lblChamp_5);
 
		textField_5 = new JTextField();
		textField_5.setBounds(103, 312, 146, 26);
		panel.add(textField_5);
		textField_5.setColumns(10);
 
 
 
		JLabel lblChamp_6 = new JLabel("champ8");
		lblChamp_6.setBounds(15, 387, 69, 20);
		panel.add(lblChamp_6);
 
		textField_6 = new JTextField();
		textField_6.setBounds(103, 384, 146, 26);
		panel.add(textField_6);
		textField_6.setColumns(10);
 
		JLabel lblChamp_7 = new JLabel("champ9");
		lblChamp_7.setBounds(15, 452, 69, 20);
		panel.add(lblChamp_7);
 
		textField_7 = new JTextField();
		textField_7.setBounds(103, 449, 146, 26);
		panel.add(textField_7);
		textField_7.setColumns(10);
 
		JLabel lblChamp_8 = new JLabel("champ10");
		lblChamp_8.setBounds(15, 536, 69, 20);
		panel.add(lblChamp_8);
 
		textField_8 = new JTextField();
		textField_8.setBounds(103, 533, 146, 26);
		panel.add(textField_8);
		textField_8.setColumns(10);
 
		JLabel lblChamp_9 = new JLabel("champ11");
		lblChamp_9.setBounds(15, 612, 69, 20);
		panel.add(lblChamp_9);
 
		textField_9 = new JTextField();
		textField_9.setBounds(103, 609, 146, 26);
		panel.add(textField_9);
		textField_9.setColumns(10);
 
 
		JLabel lblChamp_11 = new JLabel("champ11");
		lblChamp_11.setBounds(15, 736, 69, 20);
		panel.add(lblChamp_11);
 
		JTextField textField_11 = new JTextField();
		textField_11.setBounds(103, 736, 146, 26);
		panel.add(textField_11);
		textField_11.setColumns(11);
 
		JLabel lblChamp_12 = new JLabel("champ12");
		lblChamp_12.setBounds(15, 800, 69, 20);
		panel.add(lblChamp_12);
 
		JTextField textField_12 = new JTextField();
		textField_12.setBounds(103, 800, 146, 26);
		panel.add(textField_12);
 
 
		JLabel lblChamp_13 = new JLabel("champ13");
		lblChamp_13.setBounds(15, 1162, 69, 20);
		panel.add(lblChamp_13);
 
		JTextField textField_13 = new JTextField();
		textField_13.setBounds(103, 1162, 146, 26);
		panel.add(textField_13);
		textField_13.setColumns(13);	
 
 
		JLabel lblChamp_14 = new JLabel("champ13");
		lblChamp_14.setBounds(15, 1362, 69, 20);
		panel.add(lblChamp_14);
 
		JTextField textField_14 = new JTextField();
		textField_14.setBounds(103, 1362, 146, 26);
		panel.add(textField_14);
		textField_13.setColumns(14);	
 
	}	
 
 
}

salut,
pour que le scroll fonctionne on doit utiliser la gridlayout, de plus il ne faut pas mettre l'objet srcollpane dans le panel qui contient les éléments du programme (JTextField,JButton,...) mais plutôt le panel doit être un élément du scrollpane,j'ai fait un petit bricole à ton code et j’espère répondre à ton problème :):

Code:

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import java.awt.Color;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.Rectangle;
 
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
 
public class TestScroll {
    private JFrame     fr      = new JFrame( "test scroll" );
    private JPanel     panel   = new JPanel();
    private JPanel     panTab  = new JPanel();
    private Rectangle  r       = new Rectangle( 0, 0, 1000, 1000 );
    private Color      c       = Color.BLUE;
    private Point      p;
    private JPanel     panel_1 = new JPanel();
 
    private JTextField textField;
    private JTextField textField_1;
    private JTextField textField_2;
    private JTextField textField_3;
    private JTextField textField_4;
    private JTextField textField_5;
    private JTextField textField_6;
    private JTextField textField_7;
    private JTextField textField_8;
    private JTextField textField_9;
 
    public TestScroll() {
        fr.getContentPane().setBackground( Color.BLUE );
        fr.setBackground( c );
        fr.setDefaultCloseOperation( fr.EXIT_ON_CLOSE );
        fr.setSize( 1000, 1000 );
        fr.setVisible( true );
        fr.getContentPane().setLayout( null );
        fr.setLocationRelativeTo( null );
        panel.setBounds( new Rectangle( 0, 0, 1000, 1000 ) );
        panel.setBackground( c );
        panel.setBorder( null );
        panel.setLayout( null );
        fr.getContentPane().add( panel );
 
        JScrollPane scrollPane = new JScrollPane();
        scrollPane.setBounds( 10, 11, 380, 220 );
        panel.add( scrollPane );
 
        scrollPane.setViewportView( panel_1 );
        panel_1.setLayout( new GridLayout( 10, 1, 30, 50 ) );
 
        JTextArea textArea = new JTextArea();
        textArea.setBounds( 428, 11, 373, 234 );
        panel.add( textArea );
 
        JButton btnNewButton = new JButton( "New button" );
        btnNewButton.setBounds( 491, 293, 122, 23 );
        panel.add( btnNewButton );
        field( textField );
        field( textField_1 );
        field( textField_2 );
        field( textField_3 );
        field( textField_4 );
        field( textField_5 );
        field( textField_6 );
        field( textField_7 );
        field( textField_8 );
        field( textField_9 );
        panel.repaint();
        panel.revalidate();
    }
 
    public void field( JTextField t ) {
        t = new JTextField();
        t.setColumns( 30 );
        panel_1.add( t );
    }
 
    public static void main( String[] args ) {
        new TestScroll();
    }
}

Salut.

On n'est pas obligé d'utiliser un GridLayout, il faut juste utiliser un LayoutManager, sinon c'est compliqué pour que le JScrollPane connaisse la taille du viewport.

Au lieu de jpanel.setLayout(null); il suffit de faire :

Code:

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panel.setLayout(new LayoutManager2() {
 
			private List<Component> components = new ArrayList<>();
			private Dimension size=new Dimension();
 
			@Override
			public void removeLayoutComponent(Component comp) {
				components.remove(comp);
				computeSize();
			}
 
			@Override
			public Dimension preferredLayoutSize(Container parent) {
				return size;
			}
 
			@Override
			public Dimension minimumLayoutSize(Container parent) {
				return size;
			}
 
			@Override
			public void layoutContainer(Container parent) {
				computeSize();
			}
 
			@Override
			public void addLayoutComponent(String name, Component comp) {
				components.add(comp);
				computeSize();
			}
 
			private void computeSize() {
				Rectangle rectangle = new Rectangle();
				for(Component component : components) {
					rectangle = rectangle.union(component.getBounds());
				}
				size = rectangle.getSize();
				System.out.println(size);
			}
 
			@Override
			public void addLayoutComponent(Component comp, Object constraints) {
				components.add(comp);
			}
 
			@Override
			public Dimension maximumLayoutSize(Container target) {
				return size;
			}
 
			@Override
			public float getLayoutAlignmentX(Container target) {
				return 0;
			}
 
			@Override
			public float getLayoutAlignmentY(Container target) {
				return 0;
			}
 
			@Override
			public void invalidateLayout(Container target) {
				computeSize();
			}
 
 
		});

Il faut effectivement que le JScrollpane ne soit pas un composant du JPanel, mais il ne faut pas non plus que le JPanel soit composant du JScrollPane (ajouté par add()), mais viewport :

donc au lieu de

Code:

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JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(15, 235, 413, -225);
 
panel.add(scrollPane);

Code:

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JScrollPane scrollPane = new JScrollPane(panel,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
//scrollPane.setBounds(15, 235, 413, -225);
 
frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
//panel.add(scrollPane);

Il faut enlever aussi (ce n'est pas absolument indispensable, mais c'est plus propre) :

Code:

frame.getContentPane().add(panel, BorderLayout.CENTER);