用java写一个英雄pk界面里面放一个背景图片背景图片，双方有三个英雄可以选择，选择好的英雄的图片放到上面，在选择好的每个图片英雄下面放两个按钮一个是普攻一个是技能，三次普攻之后可以释放一次技能，选择好的英雄图片中间写一个vs两个字。

这里是一个基本的Java代码，实现英雄PK界面的功能：

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

public class HeroPK extends JFrame implements ActionListener {

    private JLabel vsLabel;
    private JButton[] heroButtons;
    private JButton[][] skillButtons;
    private ImageIcon[] heroImages;
    private ImageIcon[] skillImages;
    private int[] heroSelected;
    private int[] heroHP;
    private int[] heroSkillCount;
    private int roundCount;
    private JTextArea display;
    private JScrollPane scrollPane;

    public HeroPK() {
        super("Hero PK");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(600, 400);
        setLocationRelativeTo(null);

        // 初始化变量
        vsLabel = new JLabel("VS", JLabel.CENTER);
        heroButtons = new JButton[3];
        skillButtons = new JButton[3][2];
        heroImages = new ImageIcon[3];
        skillImages = new ImageIcon[3];
        heroSelected = new int[2];
        heroHP = new int[]{100, 100};
        heroSkillCount = new int[]{0, 0, 0};
        roundCount = 0;
        display = new JTextArea(10, 20);
        scrollPane = new JScrollPane(display);

        // 设置背景图片
        JLabel bgLabel = new JLabel(new ImageIcon("background.jpg"));
        bgLabel.setBounds(0, 0, getWidth(), getHeight());
        add(bgLabel);

        // 设置选择英雄的按钮和技能按钮
        for (int i = 0; i < 3; i++) {
            heroImages[i] = new ImageIcon("hero" + (i + 1) + ".jpg");
            heroButtons[i] = new JButton(heroImages[i]);
            heroButtons[i].setBounds(50 + i * 150, 50, 100, 100);
            heroButtons[i].addActionListener(this);
            bgLabel.add(heroButtons[i]);

            skillImages[i] = new ImageIcon("skill" + (i + 1) + ".jpg");
            for (int j = 0; j < 2; j++) {
                skillButtons[i][j] = new JButton(skillImages[i]);
                skillButtons[i][j].setBounds(25 + i * 150 + j * 75, 200, 50, 50);
                skillButtons[i][j].setEnabled(false);
                skillButtons[i][j].addActionListener(this);
                bgLabel.add(skillButtons[i][j]);
            }
        }

        // 设置VS标签
        vsLabel.setFont(new Font("Dialog", Font.BOLD, 36));
        vsLabel.setForeground(Color.WHITE);
        vsLabel.setBounds(250, 100, 100, 50);
        bgLabel.add(vsLabel);

        // 设置显示区域
        display.setEditable(false);
        scrollPane.setBounds(25, 275, 550, 80);
        bgLabel.add(scrollPane);

        setVisible(true);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        // 处理英雄选择事件
        for (int i = 0; i < 3; i++) {
            if (e.getSource() == heroButtons[i]) {
                heroSelected[roundCount % 2] = i;
                heroButtons[i].setBounds(50 + i * 150, 25, 100, 100);
                heroButtons[i].setEnabled(false);
                for (int j = 0; j < 2; j++) {
                    skillButtons[i][j].setEnabled(true);
                }
                roundCount++;
                if (roundCount % 2 == 0) {
                    vsLabel.setText("VS");
                } else {
                    vsLabel.setText("VS");
                }
                display.append("Round " + (roundCount / 2 + 1) + ": Player " + (roundCount % 2 + 1) + " selected hero " + (i + 1) + ".\n");
                break;
            }
        }

        // 处理技能释放事件
        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 2; j++) {
                if (e.getSource() == skillButtons[i][j]) {
                    int playerIndex = roundCount % 2;
                    int enemyIndex = (playerIndex + 1) % 2;
                    int damage = (j + 1) * 10;
                    if (heroSkillCount[i] == 3) {
                        damage *= 2;
                        heroSkillCount[i] = 0;
                    } else {
                        heroSkillCount[i]++;
                    }
                    heroHP[enemyIndex] -= damage;
                    skillButtons[i][j].setEnabled(false);
                    display.append("Round " + (roundCount / 2 + 1) + ": Player " + (playerIndex + 1) + " used skill " + (j + 1) + " of hero " + (i + 1) + ", causing " + damage + " damage. Player " + (enemyIndex + 1) + " HP: " + heroHP[enemyIndex] + ".\n");

                    // 判断是否结束游戏
                    if (heroHP[enemyIndex] <= 0) {
                        display.append("Player " + (playerIndex + 1) + " wins!\n");
                        for (int k = 0; k < 3; k++) {
                            heroButtons[k].setEnabled(false);
                            for (int l = 0; l < 2; l++) {
                                skillButtons[k][l].setEnabled(false);
                            }
                        }
                    } else if (heroSkillCount[i] == 3) {
                        display.append("Hero " + (i + 1) + " is ready to use ultimate skill!\n");
                    }
                    break;
                }
            }
        }
    }

    public static void main(String[] args) {
        new HeroPK();
    }
}

请注意，这里只是一个基本的代码示例，你需要自己添加英雄和技能的图片资源，并根据需要修改按钮的大小和位置。同时，需要注意的是，这个代码的实现只是一个非常简单的示例，实际应用中需要考虑更多的细节和异常情况。