Java 自定义 MyInteger 类实现整数操作和测试

以下是 MyInteger 类的代码：

public class MyInteger {
    private int value;
    
    public MyInteger(int x) {
        value = x;
    }
    
    public int getInt() {
        return value;
    }
    
    public boolean isEven() {
        return value % 2 == 0;
    }
    
    public boolean isOdd() {
        return value % 2 != 0;
    }
    
    public boolean isPrime() {
        if (value <= 1) {
            return false;
        }
        for (int i = 2; i <= Math.sqrt(value); i++) {
            if (value % i == 0) {
                return false;
            }
        }
        return true;
    }
    
    public boolean equals(int x) {
        return value == x;
    }
    
    public static int parseInt(String x) {
        return Integer.parseInt(x);
    }
}

以下是测试类程序：

public class MyIntegerTest {
    public static void main(String[] args) {
        // Test MyInteger(int x) constructor and getInt() method
        MyInteger num1 = new MyInteger(5);
        System.out.println('num1: ' + num1.getInt()); // Output: num1: 5
        
        // Test isEven() method
        System.out.println('num1 is even: ' + num1.isEven()); // Output: num1 is even: false
        
        // Test isOdd() method
        System.out.println('num1 is odd: ' + num1.isOdd()); // Output: num1 is odd: true
        
        // Test isPrime() method
        System.out.println('num1 is prime: ' + num1.isPrime()); // Output: num1 is prime: true
        
        // Test equals(int x) method
        System.out.println('num1 equals 5: ' + num1.equals(5)); // Output: num1 equals 5: true
        System.out.println('num1 equals 6: ' + num1.equals(6)); // Output: num1 equals 6: false
        
        // Test parseInt(String x) method
        String str = '12345';
        int num2 = MyInteger.parseInt(str);
        System.out.println('num2: ' + num2); // Output: num2: 12345
    }
}