@Override public void itemStateChanged(ItemEvent e) { String item = e.getItem().toString(); if(item == "新手难度") { constant.leiCount = 20; ResetGame(); } else if(item == "初级难度") { constant.leiCount = 43; ResetGame(); } else if(item == "中级难度"){ constant.leiCount = 63; ResetGame(); } else if(item == "高级难度"){ constant.leiCount = 99; ResetGame(); } else if(item == "大师难度") { constant.leiCount = 119; ResetGame(); } } }); p.add(combobox); frame.add(p,BorderLayout.NORTH);意思
时间: 2024-02-10 17:35:16 浏览: 77
这段代码是一个Java程序,它创建了一个下拉列表框(combobox),并且在用户选择不同的选项时,会根据选项的不同来设置不同的扫雷难度。具体来说,当用户选择"新手难度"时,雷区中的雷的数量为20;选择"初级难度"时,雷区中的雷的数量为43;选择"中级难度"时,雷区中的雷的数量为63;选择"高级难度"时,雷区中的雷的数量为99;选择"大师难度"时,雷区中的雷的数量为119。当用户选择不同的选项时,程序会调用ResetGame()方法来重置游戏。这段代码是为了实现一个扫雷游戏中难度选择的功能。
相关问题
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ipEditText = findViewById(R.id.ipEditText); portEditText = findViewById(R.id.portEditText); Button connectButton = findViewById(R.id.connectButton); connectButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String ip = ipEditText.getText().toString(); int port = Integer.parseInt(portEditText.getText().toString()); new ConnectTask().execute(ip, String.valueOf(port)); } }); Button sendMessageButton = findViewById(R.id.sendMessageButton); sendMessageButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { showSendMessageDialog(); } }); } private class ConnectTask extends AsyncTask<String, Void, Void> { @Override protected Void doInBackground(String... params) { String ip = params[0]; int port = Integer.parseInt(params[1]); try { socket = new Socket(ip, port); in = new BufferedReader(new InputStreamReader(socket.getInputStream())); out = new PrintWriter(socket.getOutputStream(), true); } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; } @Override protected void onPostExecute(Void aVoid) { super.onPostExecute(aVoid); // 获取SeekBar对象 SeekBar progressBar = findViewById(R.id.progressBar); // 添加OnSeekBarChangeListener监听器 progressBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { // 计算百分比对应的数字 int number = progress * 10; out.println(number); } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onStopTrackingTouch(SeekBar seekBar) { } }); } } @Override protected void onDestroy() { super.onDestroy(); try { if (in != null) { in.close(); } if (out != null) { out.close(); } if (socket != null) { socket.close(); } } catch (IOException e) { e.printStackTrace(); } } private void showSendMessageDialog() { AlertDialog.Builder builder = new AlertDialog.Builder(this); LayoutInflater inflater = getLayoutInflater(); View view = inflater.inflate(R.layout.dialog_send_message, null); final EditText messageEditText = view.findViewById(R.id.messageEditText); builder.setView(view) .setTitle("发送消息") .setPositiveButton("发送", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { String message = messageEditText.getText().toString(); if (out != null) { out.println(message); } } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.cancel(); } }) .create() .show(); }代码有问题,能帮我修改一下吗
在代码中没有明确指定变量的类型,在Java中要求变量的类型必须明确指定,因此需要修改代码中的变量类型。
另外,在 ConnectTask 类中的 onPostExecute 方法中,代码逻辑有误,需要进行修改。
修改后的代码如下所示:
```
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText ipEditText = findViewById(R.id.ipEditText);
final EditText portEditText = findViewById(R.id.portEditText);
Button connectButton = findViewById(R.id.connectButton);
connectButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String ip = ipEditText.getText().toString();
int port = Integer.parseInt(portEditText.getText().toString());
new ConnectTask().execute(ip, String.valueOf(port));
}
});
Button sendMessageButton = findViewById(R.id.sendMessageButton);
sendMessageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showSendMessageDialog();
}
});
}
private class ConnectTask extends AsyncTask<String, Void, Void> {
private Socket socket;
private BufferedReader in;
private PrintWriter out;
@Override
protected Void doInBackground(String... params) {
String ip = params[0];
int port = Integer.parseInt(params[1]);
try {
socket = new Socket(ip, port);
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new PrintWriter(socket.getOutputStream(), true);
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
if (socket != null) {
// 获取SeekBar对象
final SeekBar progressBar = findViewById(R.id.progressBar);
// 添加OnSeekBarChangeListener监听器
progressBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
// 计算百分比对应的数字
int number = progress * 10;
out.println(number);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
}
}
}
@Override
protected void onDestroy() {
super.onDestroy();
try {
if (in != null) {
in.close();
}
if (out != null) {
out.close();
}
if (socket != null) {
socket.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
private void showSendMessageDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
LayoutInflater inflater = getLayoutInflater();
View view = inflater.inflate(R.layout.dialog_send_message, null);
final EditText messageEditText = view.findViewById(R.id.messageEditText);
builder.setView(view)
.setTitle("发送消息")
.setPositiveButton("发送", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
String message = messageEditText.getText().toString();
if (out != null) {
out.println(message);
}
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
})
.create()
.show();
}
```
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ipEditText = findViewById(R.id.ipEditText); portEditText = findViewById(R.id.portEditText); Button connectButton = findViewById(R.id.connectButton); connectButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String ip = ipEditText.getText().toString(); int port = Integer.parseInt(portEditText.getText().toString()); new ConnectTask().execute(ip, String.valueOf(port)); } }); Button sendMessageButton = findViewById(R.id.sendMessageButton); sendMessageButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { showSendMessageDialog(); } }); } private class ConnectTask extends AsyncTask<String, Void, Void> { @Override protected Void doInBackground(String... params) { String ip = params[0]; int port = Integer.parseInt(params[1]); try { socket = new Socket(ip, port); in = new BufferedReader(new InputStreamReader(socket.getInputStream())); out = new PrintWriter(socket.getOutputStream(), true); // 在 UI 线程中创建 SeekBar handler.post(new Runnable() { @Override public void run() { SeekBar progressBar = findViewById(R.id.progressBar); progressBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { // 计算百分比对应的数字 int number = progress * 10; // 在 UI 线程中更新 ProgressBar 的进度 handler.post(new Runnable() { @Override public void run() { seekBar.setProgress(number); } }); out.println(number); } @Override public void onStartTrackingTouch(SeekBar seekBar) {} @Override public void onStopTrackingTouch(SeekBar seekBar) {} }); } }); } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; } @Override protected void onPostExecute(Void aVoid) { // 在连接结束后做一些处理 // 比如关闭连接或者显示连接成功的提示 } }代码修改
这段代码中的 `ConnectTask` 使用了 `AsyncTask` 机制,将网络连接和数据读取操作放在了后台线程中,但是在 `doInBackground` 方法中创建了 UI 控件 `SeekBar`,并在其中更新了 UI,这是不允许的。正确的做法是将 `SeekBar` 的创建和更新放在 `onPostExecute` 方法中。修改后的代码如下:
```
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ipEditText = findViewById(R.id.ipEditText);
portEditText = findViewById(R.id.portEditText);
Button connectButton = findViewById(R.id.connectButton);
connectButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String ip = ipEditText.getText().toString();
int port = Integer.parseInt(portEditText.getText().toString());
new ConnectTask().execute(ip, String.valueOf(port));
}
});
Button sendMessageButton = findViewById(R.id.sendMessageButton);
sendMessageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showSendMessageDialog();
}
});
}
private class ConnectTask extends AsyncTask<String, Void, Void> {
@Override
protected Void doInBackground(String... params) {
String ip = params[0];
int port = Integer.parseInt(params[1]);
try {
socket = new Socket(ip, port);
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new PrintWriter(socket.getOutputStream(), true);
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
// 在连接结束后做一些处理
// 比如关闭连接或者显示连接成功的提示
SeekBar progressBar = findViewById(R.id.progressBar);
progressBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
// 计算百分比对应的数字
int number = progress * 10;
out.println(number);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {}
});
}
}
```