非靜態變量不能從靜態上下文中引用

我是java的初學者。
我無法編譯下面的代碼，因爲我有17個關於「無法從靜態上下文中引用的非靜態變量」的錯誤。它總是指向「這個」。聲明。我是一名學生非靜態變量不能從靜態上下文中引用

package MyLib; 
import java.util.*; 

class Book { 

static int pages; 
static String Title; 
static String Author; 
static int status; 
static String BorrowedBy; 
static Date ReturnDate; 
static Date DueDate; 

public static final int 
    BORROWED = 0; 

public static final int 
    AVAILABLE = 1; 

public static final int 
    RESERVED = 2; 

    //constructor 
public Book (String Title, String Author, int pp) { 
    this.Title = Title; 
    this.Author = Author; 
    this.pages = pp; 
    this.status = this.AVAILABLE; 
} 

public static void borrow(String Borrower/*, Date Due*/){ 
    if (this.status=this.AVAILABLE){ 
     this.BorrowedBy=Borrower; 
     this.DueDate=Due; 

    } 
    else { 

     if(this.status == this.RESERVED && this.ReservedBy == Borrower){ 
      this.BorrowedBy= Borrower; 
      this.DueDate=Due; 
      this.ReservedBy=""; 
      this.status=this.BORROWED; 
     } 
    } 
}

來源

2013-07-23 user2604536

哇，自從這個問題出現在'SO'後只有5分鐘 – Reimeus

您的借用方法是否需要靜態？我覺得使它非靜態可以解決你的問題... – StephenTG

讓你覺得也許java IDE可能會提醒你。 – sje397