令牌上的语法错误“（”，;;令牌上的期望语法错误“，”;令牌上预期的语法错误“）”，;预计

问题描述：

我正在开发一个项目，以测试Eclipse开发人员的Eclipse IDE。我是java新手，所以我想知道为什么它不工作，因为我已经知道该怎么做。下面是代码：令牌上的语法错误“（”，;;令牌上的期望语法错误“，”;令牌上预期的语法错误“）”，;预计

public class eclipse { 

public static double main(String[] args) { 
    // TODO Auto-generated method stub 
    final double average(double number, double number2) 
    { 
     double number3 = (number + number2)/2; 
       return number3; 
    } 
    final double suk(double number4, double number5) 
    { 
     double number6 = number4 + number5; 
     return number6; 
    } 
    final double differenck(double number7, double number8) 
    { 
     double number9 = number7 - number8; 
     return number9; 
    } 
    final double produck(double number10, double number11) 
    { 
     double number12 = number10*number11; 
     return number12; 
    } 
    } 
}

这里是出现的错误：

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
Syntax error on token "(", ; expected 
Syntax error on token ",", ; expected 
Syntax error on token ")", ; expected 
Void methods cannot return a value 
Syntax error on token "(", ; expected 
Syntax error on token ",", ; expected 
Syntax error on token ")", ; expected 
Void methods cannot return a value 
Syntax error on token "(", ; expected 
Syntax error on token ",", ; expected 
Syntax error on token ")", ; expected 
Void methods cannot return a value 
Syntax error on token "(", ; expected 
Syntax error on token ",", ; expected 
Syntax error on token ")", ; expected 
Void methods cannot return a value

从'main'方法取出方法 – Reimeus

，如果你想它来编译您不能声明中方法的方法。 – Pshemo

@Pshemo你可以。但它不会编译：P – Maroun

答

你正在写在主method.Please所有的方法从main方法删除所有你的方法

public static void main(String[] args) { 
    //do something 

    } 

final double average(double number, double number2) 
    { 
     double number3 = (number + number2)/2; 
      return number3; 
    } 
    final double suk(double number4, double number5) 
    { 
     double number6 = number4 + number5; 
     return number6; 
    } 
    final double differenck(double number7, double number8) 
    { 
     double number9 = number7 - number8; 
     return number9; 
    } 
    final double produck(double number10, double number11) 
    { 
     double number12 = number10*number11; 
     return number12; 
    }

和returnmain的方法应该是void

+1，要求他删除这些方法。 – Maroun

谢谢。就像我说的，我是这个新手。 – user2487812

答

他们需要的主要方法外，还为主要方法的返回类型为void：

public static void main(String[] args) { 
    //code 

} 
final double average(double number, double number2) 
{ 
    double number3 = (number + number2)/2; 
      return number3; 
} 
final double suk(double number4, double number5) 
{ 
    double number6 = number4 + number5; 
    return number6; 
} 
final double differenck(double number7, double number8) 
{ 
    double number9 = number7 - number8; 
    return number9; 
} 
final double produck(double number10, double number11) 
{ 
    double number12 = number10*number11; 
    return number12; 
}

答

从main方法删除方法。如果您使用main作为应用程序的入口点，则返回类型为void

public static void main(String[] args) {

令牌上的语法错误“（”，;;令牌上的期望语法错误“，”;令牌上预期的语法错误“）”，;预计

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