Exception Propagation: Point Usage Validation System

Learning Objective: Learn to understand how exceptions propagate through method calls

Create system to validate point card usage points. When usage points exceed balance points, throw IllegalArgumentException in validatePointUsage() method, and learn how exception propagates through usePoints() method to main() method. Without explicitly throwing, exception automatically propagates to caller.

Input

Line 1: Balance points
Line 2: Usage points

Output

=== Point Usage Validation ===
Balance: [balance]pt
Usage: [usage]pt
Validation: Success
━━━━━━━━━━━━━━━━
Status: Points used successfully
```java

Or when exception occurs:
```java
=== Point Usage Validation ===
Balance: [balance]pt
Usage: [usage]pt
Validation: Failed
━━━━━━━━━━━━━━━━
Error: Usage exceeds balance (required: [usage], available: [balance])
```java

## Examples

### Example 1: Normal Point Usage (500/1000)
Input:
```java
1000
500
```java
Output:
```java
=== Point Usage Validation ===
Balance: 1000pt
Usage: 500pt
Validation: Success
━━━━━━━━━━━━━━━━
Status: Points used successfully
```java

### Example 2: Balance Exceeded Error (1000/500)
Input:
```java
500
1000
```java
Output:
```java
=== Point Usage Validation ===
Balance: 500pt
Usage: 1000pt
Validation: Failed
━━━━━━━━━━━━━━━━
Error: Usage exceeds balance (required: 1000, available: 500)
```java

### Example 3: Boundary Value (1000/1000)
Input:
```java
1000
1000
```java
Output:
```java
=== Point Usage Validation ===
Balance: 1000pt
Usage: 1000pt
Validation: Success
━━━━━━━━━━━━━━━━
Status: Points used successfully