I am writing a compound interest program in java but i am still pretty new at th

Question

I am writing a compound interest program in java but i am still pretty new at this and i can't seem to get this to run because it is asking for a main but i have one already. this is what i have. i need to know how to fix the main and if i run it will it do what i need. plus i need a toString method

import java.util.Scanner;

class Investment2 {

float amount;

float rate;

int years;

void Investment() {

amount=0;

rate=0;

years=0;

}

void setAmount (float a) {

amount=a;

}

void setRate (float r) {

  rate=r;

}

void setYears (int y) {

   years=y;

}    

    void main(String[] Investment2, double CompoundInterest) {

    Scanner input = new Scanner(System.in);

float a = 0;

float r = 0;

float Y = 0;

float compoundInterest = 0;

System.out.print("Enter the Principal amount : ");

    float Amount = input.nextFloat();

System.out.print("Enter the Rate : ");

rate = input.nextFloat();

System.out.print("Enter the Time : ");

    float Years = input.nextFloat();

CompoundInterest = Amount * Math.pow((1 + rate/100),Years);

System.out.println("");

System.out.println("The Compound Interest is : "

+ compoundInterest);

}

}

Explanation / Answer

/* You dont need such complications as constructer and global variable. Every console project in java needs a static void main function with a string array as argument. (public static void main(String[] args) ). That is why ur code was failing mainly. You can change the main declaration and watever u had as argument of main (String[] Investment2, double CompoundInterest), u can now define them locally and use. To make things simple I have posted a simple working code below. You are most welcome to try it out. Ask me if u have any further query or need more */

import java.util.Scanner;

class Investment2 {

public static void main(String[] args)

{

Scanner input = new Scanner(System.in);

System.out.print("Enter the Principal amount : ");

float Amount = input.nextFloat();

System.out.print("Enter the Rate : ");

double rate = input.nextFloat();

System.out.print("Enter the Time : ");

float Years = input.nextFloat();

double CompoundInterest = Amount * Math.pow((1 + rate/100),Years);

System.out.println("");

System.out.println("The Compound Interest is : "+ CompoundInterest);

}

}

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