//求兩個整數和,是新建了一個Java項目
package ch01;
public class Sum {

public static int sum(int a,int b){
int c;
c=a+b;
return c;
}

public static void main(String[] args) {
// TODO Auto-generated method stub
int x=2;
int y=3;
int z;
z=sum(x,y); //調用上面的sum函數方法,這個過程就是傳遞，是形參傳遞；
System.out.println(z);
}
}
//輸出結果是：5

eg.
public class Test{
public void function(int a){}
public static void main(String []args){
Test test=new Test();
int a=1;
test. function(a);
}
}