ActionListener does not identify the retrieved button

Question

ActionListener does not identify the retrieved button

Navigation

#1 by (0 votes)

3

My goal is to click on the Andar button and then select on the board to which direction the character will be moved, as the image shows:

MyAndarbuttonhasActionListenerandistreatedasfollows:

publicvoidactionPerformed(ActionEvente){Objectescolha=e.getSource();if(escolha==andar)moverHumano(escolha);}

However,thetype" Object escolha " does not appear to detect any action within the " moverHumano " class, even after adding ActionListener to the character-side positions.

This if, for example, is never understood to be true:

if(escolha == this.tabela[POSIÇÃO X][POSIÇÃO Y])

What do I want to do this way?

Below is the code for the MAIN class:

    package teste;
public class TESTE {
    public static void main(String[] args) {
        Tabuleiro cenario = new Tabuleiro();
        cenario.criarTela();
    }

}

Class BOARD:

package teste;

public class Tabuleiro extends JFrame implements ActionListener{
    private JButton tabela[][],andar,cura,sair,debug,percepcao,vida;
    private GridLayout layoutTabuleiro;
    Humano jogador1;

    public Tabuleiro(){ 
        super("Zumbicídio");
        setSize(800,600);
        setResizable(false);
        layoutTabuleiro = new GridLayout(14,14);
         setSize(800,600);
        jogador1 = new Humano();
        setVisible(true);
    }

    public void criarTela(){
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //ADICIONANDO ELEMENTOS
        this.visualizarTabuleiro();
        //MOSTRANDO A JANELA
        this.setVisible(true);
    }
    //No método abaixo eu adiciono tudo no tabuleiro, por isso ficou grande, mas boa parte pode ser ignorada. Acho que o que importa mesmo é ter adicionado os ActionListener, o que fiz logo no início. Adicionei printf's de teste nos locais que não funcionam no meu código original (isso tá lá embaixo, perto do método do ActionListener)
    public void visualizarTabuleiro(){
    final JPanel telaTabuleiro = new JPanel();
    int i, j;

    telaTabuleiro.setLayout(layoutTabuleiro);
    telaTabuleiro.setPreferredSize(new Dimension(600,550));

    // ADICIONANDO ACTION LISTENER
    tabela = new JButton[10][10];
    for(i=0;i<10;i++){      
        for(j=0;j<10;j++){
            this.tabela[i][j] = new JButton(new ImageIcon("res/images/desconhecido.png/"));
            this.tabela[i][j].addActionListener(this);  
        }
    }

    //ADICIONANDO ELEMENTOS

    //1 LINHA
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //2 LINHA (PRIMEIRA DO TABULEIRO) **************

    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    for(j=0;j<10;j++){
        telaTabuleiro.add(tabela[0][j]);
    }
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //3 LINHA

    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    for(j=0;j<10;j++){
        telaTabuleiro.add(tabela[1][j]);
    }
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //4 LINHA

    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    for(j=0;j<10;j++){
        telaTabuleiro.add(tabela[2][j]);
    }
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //5 LINHA

    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    for(j=0;j<10;j++){
        telaTabuleiro.add(tabela[3][j]);
    }
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //6 LINHA

    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    for(j=0;j<10;j++){
        telaTabuleiro.add(tabela[4][j]);
    }
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //7 LINHA

    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    for(j=0;j<10;j++){
        telaTabuleiro.add(tabela[5][j]);
    }
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //8 LINHA

    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    for(j=0;j<10;j++){
        telaTabuleiro.add(tabela[6][j]);
    }
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //9 LINHA

    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    for(j=0;j<10;j++){
        telaTabuleiro.add(tabela[7][j]);
    }
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //10 LINHA

    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    for(j=0;j<10;j++){
        telaTabuleiro.add(tabela[8][j]);
    }
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //11 LINHA

    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    for(j=0;j<10;j++){
        telaTabuleiro.add(tabela[9][j]);
    }
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //12 LINHA
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //13 LINHA
    telaTabuleiro.add(new Label(" "));
    vida = new JButton("hp");
    telaTabuleiro.add(vida);
    percepcao = new JButton("percep");

    telaTabuleiro.add(percepcao);

    telaTabuleiro.add(new Label(" "));
    andar = new JButton("andar");
    andar.addActionListener(this);
    telaTabuleiro.add(andar);

    telaTabuleiro.add(new Label(" "));
    cura = new JButton("cura");
    cura.addActionListener(this);
    telaTabuleiro.add(cura);

    telaTabuleiro.add(new Label(" "));
    debug = new JButton("debug");
    debug.addActionListener(this);
    telaTabuleiro.add(debug);
    telaTabuleiro.add(new Label(" "));

    telaTabuleiro.add(new Label(" "));
    sair = new JButton("sair");
    sair.addActionListener(this);
    telaTabuleiro.add(sair);
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //14 LINHA
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label("    Vida "));
    telaTabuleiro.add(new Label("  Percep. "));

    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label("   Andar"));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label("   Cura"));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label("   Debug"));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label("     Sair"));
    telaTabuleiro.add(new Label(" "));
    telaTabuleiro.add(new Label(" "));

    //ADICIONANDO NO CONTENTPANE
    this.getContentPane().add(telaTabuleiro, BorderLayout.NORTH);
}

public void moverHumano(Object escolha){
    if(escolha==tabela[0][0]){
        System.out.println("Selecionou a primeira posição!"); // O QUE DESEJO TESTAR E NÃO ESTÁ FUNCIONANDO
    }
}

@Override
public void actionPerformed(ActionEvent ae) {  
    Object escolha = ae.getSource();
    if(escolha==andar){
        System.out.println("Escolheu andar");
        moverHumano(escolha);
    }
}

Human Class:

    package teste;
public class Humano {
    private int saude, percep;
    Humano(){
        this.saude = 5;
        this.percep = 3;
    }

    public int getSaude(){
        return this.saude;
    }   

    public int getPercepcao(){
        return this.percep;
    }

}

java swing actionlistener

asked by anonymous 13.06.2018 / 04:28

1 answer

Multiple component calls in list Authentication in RESTFul service

score 0 · Answer 1

I've found some bugs and have listed them to see if they can be the cause of the problem:

All graphical applications involving the swing API should be dispatched to EDT ;
Do not use the Label class. If you are programming in java-swing, the component that should be used is JLabel . You have to be aware of this because almost all components of the package javax.swing has equivalents in java.awt , and since swing is an evolution of awt, you should always use the components of the package javax.swing ;
There is no need to deploy ActionListener to JFrame . If you're only going to apply the listener to a button, do so adding the inline listener or if the listener is applied to other buttons, create a class the isolated part that implements the interface ActionListener .
In both moverHumano() and ActionListener , you are treating a button component as Object , and trying to compare to a JButton variable, and that verification will never be true, even though there the same component is passed. Within actionPerformed() you need to cast to JButton before comparing:

@Override
public void actionPerformed(ActionEvent ae) {
    JButton escolha = (JButton) ae.getSource();
    if (escolha == andar) {
        System.out.println("Escolheu andar");
        moverHumano(escolha);
    }
}

And in the moverHumano() method, instead of receiving Object , change to JButton . Remember that for the simple fact that the listener is applied to a button, in this condition casting will always be safe, just watch out for cases where the listener is shared with different components (such as JButton and JToggleButton ). p>