Preview:
import java.util.*; 

class B extends RuntimeException 

{ 

B(String a) 

{ 

super(a); 

} 

public static void main(String... args) 

{ 

int balance=1700; 

Scanner x=new Scanner(System.in); 

System.out.print("Enter amount=");

int amount=x.nextInt(); 

if(amount>balance) 

{ 

throw new B("Invalid balance"); 

} 

else 

{ 

System.out.println("Your Amount ="+amount); 

} 

} 

}
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