Jest w Javie jakaś funkcja która czyści ekran. Nic nie znalazłem, ani w necie ani na rożnych forach. Jedyne co proponują to coś w stylu:
for(int i=0;i<100;i++){
System.out.println("");
}
A ja potrzebuje żeby nowy ekran był wyświetlany dokładnie w tym samym miejscu. Znacie jakąś funkcje albo sposób, który rozwiąże mój problem?
chodzi Ci o konsole? a co jest zlego w wypisaniu
Systm.out.println("\n........\n")
lub
for(int i=0;i<10;i++){
System.out.println();
}
?
pozdrawiam
eximius napisał(a)
chodzi Ci o konsole? a co jest zlego w wypisaniu
Systm.out.println("\n........\n")
lub
for(int i=0;i<10;i++){
System.out.println();
}
?
pozdrawiam
To, ze mój program polega na tym ze wyświetlam tablice dwuelementowa (wyspa z sygnaturami zwierząt) i elementy (symbole zwierząt) maja po zmienie (np przesuniecie o jedno pole w bok) pojawiać sie w ten sposób, że będzie sie wydawało że przemieszczają sie skokowo. Jak zrobię odstęp iluś tam linii to nic mi to nie da...
W Java nie ma metody która czyści ekran, ponieważ Java nie jest dedykowana do pracy w konsoli. Zostają Ci jedynie "domowe sposoby"
Jeżeli masz basha, to możesz użyć specjalnej sekwencji "\033[H\033[2J".
System.out.println("TEKST1");
System.out.print("\033[H\033[2J");
System.out.flush();
System.out.println("TEKST2");
W wyniku otrzymasz tylko "TEKST2" na górze ekranu.
Program będę musiał odpalić na zajęciach, a jest tam zainstalowany Windows wiec o Bashu mogę pomarzyć ;) Potrzebuje wyświetlać tablice dwuwymiarowa Stringow (plansze-wyspę). Wyświetlam poprzestawiane elementy w równych odstępcach czasu. Mozecie polecić jak to najlepiej/najprościej zrobić?
Probowałem to zrobić dzisiaj w JOptionPane.showMessageDialog(), ale to odpada bo za każdym razem trzeba klikać OK, pyzatym "pamięta" co było w poprzednim oknie i każde następne okno jest 2x większe.
Prosze o pomoc
Zadeklaruj tablicę o wymiarach ekranu konsoli. Przy czyszczeniu zapisz cały ekran znaczkami "" a potem wrzuć całą tablicę na konsolę i po sprawie.
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.BorderFactory;
import javax.swing.JComboBox;
import javax.swing.JPanel;
import javax.swing.JFormattedTextField;
import javax.swing.JLabel;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import javax.swing.text.NumberFormatter;
import java.awt.Color;
import java.awt.ComponentOrientation;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Queue;
import java.util.LinkedList;
import java.util.HashMap;
import java.awt.Graphics;
import java.text.NumberFormat;
public class Main extends JFrame {
private Thread draw;
private AsciiPanel asciiPanel ;
private JButton start;
private JButton stop;
private JButton add;
private JButton reset;
private JButton clear;
private JFormattedTextField delay;
private JLabel delay_lab;
private JTextArea sequence;
private JScrollPane sequence_sp;
JComboBox box;
private HashMap map;
private ActionListener aListener;
private MainRunnuble mainRunnuble;
public Main() {
super("Matrix Drawer");
this.setSize(255,255);
this.setResizable(false);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.getContentPane().setLayout(null);
initComponents();
addComponents();
initValues();
this.setVisible(true);
System.runFinalizersOnExit(true);
}
private void initComponents() {
aListener = new MainActionListener(this);
mainRunnuble = new MainRunnuble();
map = new HashMap();
asciiPanel = new AsciiPanel();
asciiPanel.setBorder( BorderFactory.createLineBorder(Color.BLACK, 1) );
asciiPanel.setBounds(10, 5, 160, 160);
start = new JButton("Start");
start.setActionCommand("start");
start.addActionListener(aListener);
start.setBounds(175, 5, 70, 20);
stop = new JButton("Stop");
stop.setActionCommand("stop");
stop.addActionListener(aListener);
stop.setBounds(175, 30, 70, 20);
reset = new JButton("Reset");
reset.setActionCommand("reset");
reset.addActionListener(aListener);
reset.setBounds(175, 55, 70, 20);
clear = new JButton("Clear");
clear.setActionCommand("clear");
clear.addActionListener(aListener);
clear.setBounds(175, 80, 70, 20);
add = new JButton("Dodaj");
add.setActionCommand("add");
add.addActionListener(aListener);
add.setBounds(105, 175, add.getPreferredSize().width, 20);
box =new JComboBox();
box.setBackground(Color.WHITE);
box.addItem("A");
map.put("A", getA());
box.addItem("B");
map.put("B", getB());
box.setBounds(10, 175, 90, 20);
delay_lab = new JLabel("Opóźnienie");
delay_lab.setBounds(10, 200, 70, 20);
NumberFormat formatter = NumberFormat.getIntegerInstance();
formatter.setGroupingUsed(false);
delay = new JFormattedTextField(formatter);
delay.setBorder( BorderFactory.createLineBorder(Color.BLACK, 1) );
delay.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
delay.setText("1000");
delay.setBounds(80, 200, 90, 20);
sequence = new JTextArea("");
sequence.setEditable(false);
sequence.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
sequence.setBorder( BorderFactory.createLineBorder(Color.BLACK, 1) );
sequence_sp = new JScrollPane(sequence);
sequence_sp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
sequence_sp.setBounds(175, 105, 70, 110);
}
private void addComponents() {
this.getContentPane().add(asciiPanel);
this.getContentPane().add(start);
this.getContentPane().add(stop);
this.getContentPane().add(reset);
this.getContentPane().add(clear);
this.getContentPane().add(add);
this.getContentPane().add(box);
this.getContentPane().add(delay_lab);
this.getContentPane().add(delay);
this.getContentPane().add(sequence_sp);
}
private void initValues() {
if(mainRunnuble == null || sequence == null) return;
for(int i=0; i<6; i++) {
mainRunnuble.add(((i % 2 ==0) ? getA() : getB() ), 1000);
if(i % 2 == 0) {
if(i == 0) {
sequence.append("\tA<<<\n");
} else {
sequence.append("\tA\n");
}
}else {
if(i == 0) {
sequence.append("\tB<<<\n");
} else {
sequence.append("\tB\n");
}
}
}
sequence.select(0,0);
}
private String[][] getA() {
String[][] a = {
{"-","-","-","-","-","-","#","#","-","-","-","-","-","-"},
{"-","-","-","-","-","#","#","#","#","-","-","-","-","-"},
{"-","-","-","-","#","#","-","-","#","#","-","-","-","-"},
{"-","-","-","#","#","-","-","-","-","#","#","-","-","-"},
{"-","-","#","#","-","-","-","-","-","-","#","#","-","-"},
{"-","-","#","#","#","#","#","#","#","#","#","#","-","-"},
{"-","-","#","#","-","-","-","-","-","-","#","#","-","-"},
{"-","-","#","#","-","-","-","-","-","-","#","#","-","-"},
{"-","-","#","#","-","-","-","-","-","-","#","#","-","-"}
};
return a;
}
private String[][] getB() {
String[][] b = {
{"-","-","#","#","#","#","#","#","-","-","-","-","-","-"},
{"-","-","#","#","-","-","-","-","#","#","-","-","-","-"},
{"-","-","#","#","-","-","-","-","#","#","-","-","-","-"},
{"-","-","#","#","-","-","-","#","#","-","-","-","-","-"},
{"-","-","#","#","#","#","#","#","#","#","-","-","-","-"},
{"-","-","#","#","-","-","-","-","#","#","-","-","-","-"},
{"-","-","#","#","-","-","-","-","#","#","-","-","-","-"},
{"-","-","#","#","-","-","-","-","#","#","-","-","-","-"},
{"-","-","#","#","#","#","#","#","#","-","-","-","-","-"}
};
return b;
}
private class MainActionListener implements ActionListener {
private JFrame frame;
public MainActionListener(JFrame frame) {
this.frame = frame;
}
public void actionPerformed(ActionEvent e) {
if(e.getActionCommand().equalsIgnoreCase("start")) {
try {
draw.stop();
}catch(Exception ex) {}
draw = new Thread(mainRunnuble);
draw.start();
} else if(e.getActionCommand().equalsIgnoreCase("stop")) {
try {
draw.stop();
}catch(Exception ex) {}
} else if(e.getActionCommand().equalsIgnoreCase("add")) {
Object selected = box.getSelectedItem();
String[][] matrix = null;
try {
matrix = (String[][])map.get(selected);
}catch(ClassCastException ex) {
return;
}
String s = delay.getText();
long delay = 0;
try {
delay = Long.parseLong(s);
}catch(Exception ex) {}
mainRunnuble.add(matrix, delay);
if(sequence.getText().split("\n")[0].equals("")) {
sequence.append("\t"+box.getSelectedItem()+"<<<\n");
} else {
sequence.append("\t"+box.getSelectedItem()+" \n");
}
sequence.select(0,0);
} else if(e.getActionCommand().equalsIgnoreCase("reset")) {
try {
draw.stop();
}catch(Exception ex) {}
mainRunnuble.clear();
asciiPanel.setMatrix(null);
sequence.setText("");
initValues();
} else if(e.getActionCommand().equalsIgnoreCase("clear")) {
try {
draw.stop();
}catch(Exception ex) {}
mainRunnuble.clear();
asciiPanel.setMatrix(null);
sequence.setText("");
}
}
}//koniec klasy MainActionListener
private class MainRunnuble implements Runnable {
private Queue<Object[]> tablice;
public MainRunnuble() {
tablice = new LinkedList<Object[]>();
}
public boolean add(String[][] matrix, long delay) {
if(matrix == null) return false;
if(delay<=0) delay = 0;
Object[] data = {
matrix,
new Long(delay)
};
return tablice.offer(data);
}
public void clear() {
while(tablice.poll() != null);
}
/*
*
*/
public void run() {
while(true) {
while(tablice.peek() != null) {
Object o = tablice.poll();
if(o == null) continue;
if(!(o instanceof Object[])) continue;
Object[] data = (Object[])o;
if(data.length != 2) continue;
String[][] matrix = null;
long delay = 0;
try {
matrix = (String[][]) data[0];
delay = (Long) data[1];
}catch(ClassCastException e) {
continue;
}
try {
drawMatrix(matrix, delay);
}catch(InterruptedException e) {
return ;
}
}
}
}
/*
*
*/
private synchronized void drawMatrix(String[][] matrix, long delay) throws InterruptedException {
asciiPanel.setMatrix(matrix);
if(sequence.getText() != null && sequence.getText() != "") {
String[] text = sequence.getText().split("\n");
StringBuffer s = new StringBuffer(text.length -1);
for(int i=1 ;i<text.length; i++) {
if(i == 1) {
s.append(text[i]+"<<<\n");
} else {
s.append(text[i]+"\n");
}
}
sequence.setText(s.toString());
sequence.select(0,0);
}
Thread.sleep(delay);
}
}//koniec klasy AsciiDrawer
@Override
protected void finalize() throws Throwable {
try {
draw.stop();
}finally {
super.finalize();
}
}
public static void main(String args[]) {
try {
new Main();
}catch(Exception e) {
e.printStackTrace();
}
}
}
class AsciiPanel extends JPanel {
private String[][] matrix = null;
public AsciiPanel() {
super();
this.setOpaque(false);
}
public void setMatrix(String[][] matrix) {
this.matrix = matrix;
repaint();
}
private void drawMatrix(Graphics g) {
if(matrix == null) return;
g.setColor(Color.BLACK);
int y = 20;
int x = 10;
for(int i=0; i<matrix.length; i++) {
x = 10;
for(int j=0; j<matrix[i].length; j++) {
g.drawString(matrix[i][j], x, y);
x+=10;
}
y+=10;
}
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(Color.WHITE);
g.fillRect(0, 0, this.getSize().width, this.getSize().height);
drawMatrix(g);
}
}
OK. znalazlem o co mi chodzilo. Mozna usunac posta.