声明用户定义对象的语法错误 [英] Syntax error for declaration of user defined objects

问题描述

在java中你必须编写一个构造函数，并且在其中必须使用this关键字并且我开始搞乱这个



什么我试过了：

  class  add {
  //   private int q;  
  //   private int z;  
  public  add（）{
  this  .s = 0; 
 此 .f = 0; 
} 
  public   int  a（ int  g， int  d）{
  this  .s = g; 
 此 .f = d; 
 
  return  g + d; 
} 
  public   void  main（字符串 [] args）{
 add d =  new  add（）; 
} 
 
} 

解决方案

这与前一个问题完全相同构造函数中的this问题 [ ^ ]。您正在尝试引用不存在的变量。变量 s 和 f 未在您的班级中定义。



我建议你去 Trail：学习Java语言（Java教程） [ ^ ]并完成教程。

in java you have to code a constructor and in it "this " keyword has to be used and i am gettin g messed with this

What I have tried:

class add{
    // private int q;
    // private int z;
    public add(){
        this.s=0;
        this.f=0;
    }
    public int a(int g,int d){
        this.s = g;
        this.f = d;

        return g+d;
    }
    public void main(String[] args) {
        add d = new add();		
    }

}

解决方案

This is exactly the same issue as your previous question Problem with "this" in constructor[^]. You are trying to refer to variables that do not exist. The variables s and f are not defined in your class.

I suggest you go to Trail: Learning the Java Language (The Java Tutorials)[^] and work through the tutorials.

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