Question

我对编程很陌生，而且仍然容易受到无知的错误的影响。我有一个类，应该以数组的形式保存参数数据库。各个参数将通过另一个类的编号调用。为什么我在Ksp;和}旁边收到错误消息。我已经把它弄乱了很久。
谢谢你的帮助。很抱歉有更大的代码段。错误是朝向开始和结束

public class PlanMat
{

    double GPa = Constants.GPascals;

    public int i ;
    public int eos [ ];    
    public double rho0[ ]; 
    public double c [ ];
    public double nn [ ];
    public double Ks0 [ ];
    public double Ksp [ ];

    i = new int [ 51 ];
    eos = new int [ 51 ];
    rho0 = new double [ 51 ];
    c = new double [ 51 ];
    nn = new double [ 51 ];
    Ks0 = new double [ 51 ];
    Ksp =new double [ 51 ];

    i = 0;
    eos [ 0 ] = 0;
    rho0 [ 0 ] = 0;
    c [ 0 ] = 0;
    nn [ 0 ] = 0;
    Ks0 [ 0 ] = 0;
    Ksp [ 0 ] = 0;
}

Answer 1

  public int i ;
 i = new int [51];

然后你应该声明我喜欢一个数组

  public int[] i ;

在您执行某些行之后i = 0;这意味着i是一个变量

首先，如果i是array或variable

，请具体说明

Answer 2

有两个问题

我应该是一个数组

public int [] i

您无法初始化变量并分配您所做的值。使用构造函数来执行此操作。类似于以下内容

公共课PlanMat {

    double GPa = Constants.GPascals;

    public int[] i = new int[51];
    public int eos[];
    public double rho0[];
    public double c[];
    public double nn[];
    public double Ks0[];
    public double Ksp[];

    public PlanMat() {
        i = new int[51];
        eos = new int[51];
        rho0 = new double[51];
        c = new double[51];
        nn = new double[51];
        Ks0 = new double[51];
        Ksp = new double[51];

        i[0] = 0;
        eos[0] = 0;
        rho0[0] = 0;
        c[0] = 0;
        nn[0] = 0;
        Ks0[0] = 0;
        Ksp[0] = 0;
    }
}

N.B。您只能在类定义中声明变量。但你不能在那里分配值。

Answer 3

试试这个

  public class PlanMat
    {
    public int i[];
            public int eos[];    
            public double rho0[]; 
            public double c[];
            public double nn[];
            public double[] Ks0;
            public double[] Ksp;

            public void assign(){
                i = new int [ 51 ];
                eos = new int [ 51 ];
                rho0 = new double [ 51 ];
                c = new double [ 51 ];
                nn = new double [ 51 ];
                Ks0 = new double [ 51 ];
                Ksp =new double [ 51 ];
            }
            public void add(){
                i[0] = 0;
                eos [ 0 ] = 0;
                rho0 [ 0 ] = 0;
                c [ 0 ] = 0;
                nn [ 0 ] = 0;
                Ks0 [ 0 ] = 0;
                Ksp [ 0 ] = 0;
            }
    }

有2个变化我是一个数组而且 2.根据您的要求添加两个功能

java类中的编译错误

3 个答案: