I booted up eclipse to start on a project, and without typing in a word I already have several errors.

    package department.namespace;

import android.app.Activity;
import android.os.Bundle;

public class DepartmentActivity extends Activity {
    /** Called when the activity is first created. */   
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

At package department.namespace, it says:

• multiple marks at this line and the type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files

• The import android.os cannot be resolved.

• Override cannot be resolved as a type

• The method OnCreate(Bundle) is undefined for the type Activity

• R. cannot be resolved as a variable.

Since this JUST came up when I started Eclipse, how do I fix this?