私人施工人员干扰公共方法测试[关闭]

Question

为什么不能正确编译？为了测试它，我添加了main方法行，但是我得到了很多错误，说私有构造函数和公共构造函数都是表达式的非法开头，还说它们不是语句。它还要求我在我认为不必要的地方添加分号，因为分号是方法的开始。我不希望任何人为我重新输入代码，但至少有人能给我指出正确的方向，告诉我哪里出了问题吗？

import java.util.Arrays 
public class Book{
    public static void main (String[] args) {



    private String title;           
    private String authors[];       


    public Book() {
        title = "Test";     
        authors = null;             
    }

    public Book(String title, String[] authors) {   
        this.title = title;
        this.authors = authors;     
    }
    public String getterTitle() {       
        return title;
    }
    public void setterTitle(String title) { 
        this.title = title;
    }
    public String[] getterAuthors() {       
        return authors; 
    }
    public void setterAuthors(String[] authors) {       
        this.authors = authors;
    }
    public String bookToString() {
        return "" + getterTitle() + " by " + getterAuthors() + "";
    }
}

Answer 1

import java.util.Arrays; // the semi - colon is missing on this line  
public class Book{
private String title;         
private String authors[]; // to make these variables global you 
                         // need to declare them outside of a method  

public static void main (String[] args) {   
 } // you need to close the method before beginning with others

更正上述内容应该会为您修复代码。

Answer 2

我想我知道你的意思。

所以你想做2节课。

这是主要的。

测试本。JAVA

    package testbook;

    public class TestBook {

        public static void main(String[] args) {
            // TODO code application logic here
            Book bookClass = new Book();

        }
    }

这个是类。

Book.java

package testbook;

public class Book {

    private String title;
    private String authors[];

    public Book() {
        title = "Test";
        authors = null;
    }

    public Book(String title, String[] authors) {
        this.title = title;
        this.authors = authors;
    }

    public String getterTitle() {
        return title;
    }

    public void setterTitle(String title) {
        this.title = title;
    }

    public String[] getterAuthors() {
        return authors;
    }

    public void setterAuthors(String[] authors) {
        this.authors = authors;
    }

    public String bookToString() {
        return "" + getterTitle() + " by " + getterAuthors() + "";
    }
}

Answer 3

java之后缺少分号。util。数组和你的主没有结束符}大括号：

import java.util.Arrays;

public class Book {
    private String title;           
    private String authors[];

    public Book(String title, String[] authors) {   
        this.title = title;
        this.authors = authors;     
    }

    public String getterTitle() {       
        return title;
    }

    public void setterTitle(String title) { 
        this.title = title;
    }

    public String[] getterAuthors() {       
        return authors; 
    }

    public void setterAuthors(String[] authors) {       
        this.authors = authors;
    }

    public String bookToString() {
        return "" + getterTitle() + " by " + getterAuthors() + "";
    }

    public static void main (String[] args) {
         // Do something here
    }
}