org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.OutOfMemoryError: Java heap space)

这个异常通常是因为 Java 程序运行时申请的内存不足导致的。要解决这个问题，可以尝试以下几种方法：
1. 增加 Java 程序的内存限制，可以通过在运行程序时添加 JVM 参数 -Xmx 来增加内存限制，例如：java -Xmx2g MyProgram。
2. 检查程序代码，看是否存在内存泄漏等问题。
3. 减少程序对内存的占用，例如使用缓存等技术。

相关问题

org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.IllegalArgumentException: Argument cannot be null)

This exception indicates that an argument passed to a method in the SWT (Standard Widget Toolkit) library is null, which is not allowed.

To resolve this issue, you need to identify the method that is throwing this exception and ensure that all the arguments passed to it are not null. You can do this by checking the code that is executing when the exception occurs and tracing it back to the method that is causing the problem.

Once you have identified the method, you can check its documentation to see which arguments are required and ensure that you are passing valid values for them. You may also need to add some null checks in your code to prevent this exception from occurring.

Overall, this exception is often caused by programming errors, such as forgetting to initialize a variable or passing null to a method that does not allow it. Therefore, it is important to carefully review your code and ensure that all arguments are properly initialized and passed to methods.

Exception in thread "Timer-0" org.eclipse.swt.SWTException: Invalid thread access

This exception is thrown when an SWT operation is performed from a non-UI thread. SWT is a user interface toolkit used in Java applications, and it requires all UI-related operations to be performed from the UI thread.

To fix this exception, you need to ensure that any SWT-related operations are performed from the UI thread. This can be achieved by using the `Display.asyncExec()` or `Display.syncExec()` methods, which execute a Runnable on the UI thread.

For example, if you have a Timer that updates a SWT component, you can wrap the update code in a `Display.asyncExec()` block:

Timer timer = new Timer();
timer.schedule(new TimerTask() {
    @Override
    public void run() {
        Display.getDefault().asyncExec(new Runnable() {
            public void run() {
                // Update SWT component here
            }
        });
    }
}, 0, 1000);

This ensures that the update code is executed on the UI thread and avoids the Invalid thread access exception.