分别通过无参构造方法和带参构造方法,完成对象实例化实例化对象,并打印输出对象信息,输出格式如效果图。 效果图:
时间: 2023-05-24 20:04:23 浏览: 100
无参构造方法:
```
public class Person {
private String name;
private int age;
public Person() {
this.name = "Unknown";
this.age = 0;
}
public void display() {
System.out.println("Name: " + this.name);
System.out.println("Age: " + this.age);
}
public static void main(String[] args) {
Person p = new Person();
p.display();
}
}
```
输出结果:
```
Name: Unknown
Age: 0
```
带参构造方法:
```
public class Person {
private String name;
private int age;
public Person(String name, int age) {
this.name = name;
this.age = age;
}
public void display() {
System.out.println("Name: " + this.name);
System.out.println("Age: " + this.age);
}
public static void main(String[] args) {
Person p = new Person("John", 25);
p.display();
}
}
```
输出结果:
```
Name: John
Age: 25
```
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