java中的基本练习

int a = 10;
float b = 3.14f;
double c = 2.71828;
char d = 'A';
boolean e = true;

if (a > 5) {
    System.out.println("a is greater than 5");
} else {
    System.out.println("a is less than or equal to 5");
}

for (int i = 0; i < 10; i++) {
    System.out.println("i = " + i);
}

int[] arr = {1, 2, 3, 4, 5};
List<String> list = new ArrayList<>();
list.add("hello");
list.add("world");

class Person {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }
}

Person p = new Person("Alice", 25);
System.out.println("Name: " + p.getName());
System.out.println("Age: " + p.getAge());

class Student extends Person {
    private String school;

    public Student(String name, int age, String school) {
        super(name, age);
        this.school = school;
    }

    public String getSchool() {
        return school;
    }
}

Student s = new Student("Bob", 20, "ABC University");
System.out.println("Name: " + s.getName());
System.out.println("Age: " + s.getAge());
System.out.println("School: " + s.getSchool());

try {
    int result = 10 / 0;
} catch (ArithmeticException e) {
    System.out.println("Divide by zero is not allowed");
}