使JTextArea可序列化

时间:2012-11-11 05:33:00

标签: java sockets nullpointerexception jtextarea serializable

当我尝试通过套接字发送此类时,我得到的全部是NullPointException。我怎么做才能得到NullPoint Exceptions?

public class Hick implements Serializable{
public JTextArea jta;
public Hick(){
jta = new JTextArea();
}
}

1 个答案:

答案 0 :(得分:1)

我使用以下代码测试它似乎工作正常...

我会确保您可以先在本地序列化对象,以排除任何潜在的问题。如果仍然无法通过套接字加载它,那么套接字代码是错误的,而不是序列化

public class TestSerialisation {

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

    public TestSerialisation() {
        ObjectOutputStream oos = null;
        ObjectInputStream ois = null;
        Wrapper out = new Wrapper();
        System.out.println("Before = " + out.dump());
        try {
            try {
                oos = new ObjectOutputStream(new FileOutputStream(new File("Test.out")));
                oos.writeObject(out);
            } finally {
                try {
                    oos.close();
                } catch (Exception e) {
                }
            }

            Wrapper in = null;
            try {
                ois = new ObjectInputStream(new FileInputStream(new File("Test.out")));
                in = (Wrapper) ois.readObject();
            } finally {
                try {
                    ois.close();
                } catch (Exception e) {
                }
            }            
            System.out.println("After = " + (in == null ? "null" : in.dump()));            
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
        }
    }

    public static class Wrapper implements Serializable {

        private JTextArea textArea;

        public Wrapper() {
            textArea = new JTextArea("I'm some text");
        }

        public String dump() {
            return textArea.getText();
        }
    }
}

另外,请确保您运行的是Java兼容版本(如果我的内存正确供给我),则两端都有兼容的序列化对象版本。