Case code sharing: summation problem of calling methods in Java-javaTutorial-php.cn

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Case code sharing: summation problem of calling methods in Java

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Aug 02, 2018 pm 02:46 PM

package dayone1;

public class Methon {
    public static void main(String[]args){
//        int a=10;
//        int b=20;
//        int sum=a+b;
//        System.out.println(sum);
       int sum=Add(5,6);//1.调用Add方法，将5和6分别传递给a和b
                        //5.将方法的结果返回给sum         
       System.out.println(sum);//6.打印sum的值
    }
    public static int Add(int a,int b){//2.赋值a=5,b=6
        int sum=a+b;//3.执行语句把a和b相加赋值给sum
        return sum;//4.通过return将sum的结果返回
    }
}
* A:为什么要有方法
	* 提高代码的复用性 
* B:什么是方法
	* 完成特定功能的代码块。 
* C:方法的格式
* 
		修饰符 返回值类型 方法名(参数类型 参数名1,参数类型 参数名2...) {
			方法体语句;
			return 返回值; 
		} 
* D:方法的格式说明
	* 修饰符：目前就用 public static。。
	* 返回值类型：就是功能结果的数据类型。
	* 方法名：符合命名规则即可。方便我们的调用。
	* 参数：
		* 实际参数：就是实际参与运算的。
		* 形式参数；就是方法定义上的，用于接收实际参数的。
	* 参数类型：就是参数的数据类型
	* 参数名：就是变量名
	* 方法体语句：就是完成功能的代码。
	* return：结束方法的。
	* 返回值：就是功能的结果，由return带给调用者。

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