java内存溢出的四种情况是什么

public class HeapOOM {
    static class User {}
    public static void main(String[] args) {
         List<User> list = new ArrayList<User>();
            while (true) {
                list.add(new User());
         }
    }
}
/*Exception in thread "main" java.lang.OutOfMemoryError:
GC overhead limit exceeded
at com.fdd.test.HeapOOM.main(HeapOOM.java:11)*/

public class StackOutOfMemoryError {
    public static void main(String[] args) {     
         test();
    }
    private static void go() {
        System.out.println("StackOverflowError异常");
        test();
    }
}
/*Exception in thread "main" java.lang.StackOverflowError
    at sun.nio.cs.ext.DoubleByte$Encoder.encodeLoop(DoubleByte.java:617)
    at java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:579)
    at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:271)
    at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:125)
    at java.io.OutputStreamWriter.write(OutputStreamWriter.java:207)
    at java.io.BufferedWriter.flushBuffer(BufferedWriter.java:129)
    at java.io.PrintStream.write(PrintStream.java:526)
    at java.io.PrintStream.print(PrintStream.java:597)
    at java.io.PrintStream.println(PrintStream.java:736)
    at com.fdd.test.StackOutOfMemoryError.go(StackOutOfMemoryError.java:11)
at com.fdd.test.StackOutOfMemoryError.go(StackOutOfMemoryError.java:13)*/