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法律研究Java 程序从另一个调用一个构造函数
在本文中，我们将了解如何从另一个调用一个构造函数。关键字“this()”用于调用一个构造函数。
以下是相同的演示。我们将使用 this() 显示两个数字的和与乘积 −
输入
假设我们的输入是 −
The numbers are defined as 12 and 30
输出
所需的输出将是 −
The sum is: 42 The product is: 360
算法
Step 1 - START Step 2 - Declare an integer value namely my_sum Step 3 - In the main class, we define a ‘this’ reference to the numbers which would be used as input. Step 4 - This will call the ‘this’ constructor that invokes the current class constructor. Step 5 - Another ‘display’ function is used to display the sum. Step 6 - An object of the class is created, and the functions are invoked to display the result
示例 1
在此处正在计算两个数字的和。
public class Main {
int my_sum;
Main() {
this(12, 30);
}
Main(int my_input_1, int my_input_2) {
System.out.println("The numbers are defined as " +my_input_1 +" and " +my_input_2);
this.my_sum = my_input_1 + my_input_2;
}
void display() {
System.out.println("The sum is: " + my_sum);
}
public static void main(String[] args) {
Main my_object = new Main();
my_object.display();
}
}输出
The numbers are defined as 12 and 30 The sum is: 42
示例 2
在此处正在计算两个数字的乘积。
public class Main {
int my_product;
Main() {
this(12, 30);
}
Main(int my_input_1, int my_input_2) {
System.out.println("The numbers are defined as " +my_input_1 +" and " +my_input_2);
this.my_product = my_input_1 * my_input_2;
}
void display() {
System.out.println("The product of the two values is: " + my_product);
}
public static void main(String[] args) {
Main my_object = new Main();
my_object.display();
}
}输出
The numbers are defined as 12 and 30 The product of the two values is: 360
更新于： 22-Feb-2022
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