public class Box<T> { private T item; public Box(T item) { this.item = item; } public T getItem() { return item; } public void setItem(T item) { this.item = item; } } // 使用示例 Box<String> stringBox = new Box<>("Hello"); System.out.println(stringBox.getItem()); // 输出: Hello Box<Integer> integerBox = new Box<>(123); System.out.println(integerBox.getItem()); // 输出: 123
preparedStatement.setObject(1,1);
System.out.println("替换后的字符串: " + replacedInput);
System.out.println("Is a equal to b? " + isEqual);
public static void main(String[] args) {
public class OperatorExample {
VariableNamingExample person = new VariableNamingExample("John", 30);