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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
public class a_a2 {  //主類別
 
	public static void main(String[] args) {
		Creditcard myAccount = new Creditcard();
		myAccount.cardName = "Paul";
		myAccount.cardNo = 12345678;
		myAccount.balance = 50000;
		myAccount.show();  //使用 "呼叫" 的方式來傳遞資料。 "物件名稱.方法名稱();"
 
		Creditcard myAccount1 = new Creditcard();
		myAccount1.cardName = "Mary";
		myAccount1.cardNo = 98763542;
		myAccount1.balance =200000;
		myAccount1.show();		
	}
 
}
 
class Creditcard  //自建類別
{
	String cardName;  //屬性-cardName
	int cardNo;       //屬性-cardNo
	double balance;   //屬性-balance
 
	void show()   //方法
	{
	  System.out.println("持有人名字為: " + cardName +
		 				 "\n卡號為: " + cardNo +
		                 "\n可刷金額為: " + balance + " 元"+"\n");	
	}
}
}

Main.java:13: error: non-static variable this cannot be referenced from a static context
		Creditcard myAccount = new Creditcard();
		                       ^
Main.java:19: error: non-static variable this cannot be referenced from a static context
		Creditcard myAccount1 = new Creditcard();
		                        ^
Main.java:12: error: Illegal static declaration in inner class Ideone.a_a2
	public static void main(String[] args) {
	                   ^
  modifier 'static' is only allowed in constant variable declarations
3 errors

Standard output is empty