primitive type (基本类型)的值(char,boolean,byte,short,int,long,float,double)
被传递到方法的的时候,这个值被复制,然后传递。
两个文件
①Sample.java
②Main.java
-----------------------------------------------------------------------------------------------------
①Sample.java
package chapter621;
public class Sample {
int num;
public Sample(int num) {
this.num = num;
}
}
-----------------------------------------------------------------------------------------------------
②Main.java
package chapter621;
public class Main {
public static void main(String[] args) {
Sample s = new Sample(10);
modify(s.num);
System.out.println(s.num);
}
private static void modify(int num) {
num *= 2;
}
}
运行之后的,输出10