Java program find the growth in national consumption for five years using the distributed lag model

Program:

import javax.swing.*;
class discrete
{
public static void main(String args[])
{
int n,i=0;

int g[]=new int[20];
double I[]=new double[20];
double y[]=new double[20];
double t[]=new double[20];
double c[]=new double[20];
y[i]=Double.ParseDouble(JOptionpane.showInputDialog("enter y[0]"));
System.out.println("enter y[0] value"+y[i]);
n=Integer.ParseInt(JOptionpane.showInputDialog("enterno of years"));
System.out.println("enter no of years"+n);
for(i=1;i<=n;i++)
{
g[i]=Integer.ParseInt(JOptionpane.showInputDialog("enter g["+(i)+"]"));
System.out.println("enter g["+(i)+"]"+g[i]);
}
for(i=1;i<=n;i++)
{
I[i]=2+0.1*y[i-1];
y[i]=45.45=2.27*(c[i]+g[i]);
y[i]=0.2*y[i];
c[i]=20+0.7*(y[i]-t[i]0;
}
System.out.println("\n year gov expend investmest national income taxes consumption");
System.out.println("\n * * * * * *");
for(i=1;i<=n;i++)
{
System.out.println("\n"+(i)+" "+g[i]+" "+I[i]+" "+y[i]+" "+t[i]+" "+c[i]);
}
}
}