如何在Java中检查两个对象是否具有相同的值？

public class MyClass {
    private int value;

    public MyClass(int value) {
        this.value = value;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }
        MyClass other = (MyClass) obj;
        return value == other.value;
    }

    public static void main(String[] args) {
        MyClass obj1 = new MyClass(10);
        MyClass obj2 = new MyClass(10);
        MyClass obj3 = new MyClass(20);

        System.out.println(obj1.equals(obj2));  // 输出 true
        System.out.println(obj1.equals(obj3));  // 输出 false
    }
}