java定义一个方法,接收一个四位数,然后求出每位数字之和

首先里面的是参数,你这里之传入一个参数,long是参数的类型,num是参数的名称,比如在别的地方调用此方法,它必须要传入一个long的参数,如publicvoidxx(){longxx=5;rever

staticvoidjuxing(doublex,doubley){//x和y是长,宽doubled=2*x+2*y;//周长doubles=x*y;//面积System.out.println("矩

classscore{privatedoubleenglish;publicvoidsetScore(doubleenglish){this.english=english;}publicvoidpr

importjava.util.Scanner;classRound{\x09publicdoubleperimeter(doubleradius){\x09\x09returnradius*2;\x

classCircle{\x09privatedoubler;\x09publicvoidsetR(doubler)\x09{\x09\x09this.r=r;\x09}\x09publicdoubl

classTriangle{inta,b,c,l;publicstaticvoidperimeter(){l=a+b+c;}}publicclassTriangleTest{publicstaticv

1.定义抽象类AbstractImageimportjava.awt.Graphics;publicabstractclassAbstractImage{publicabstractvoiddraw(

邮箱有不,做好了发你再问：lmyzai@谢谢你了急用sina.com再答：算了直接上传给你

publicclassTriangle{intedge1;intedge2;intedge3;Triangle(inta,intb,intc){edge1=a;edge2=b;edge3=c;doub

引入包类我还没有学,不好意思.希望对你有助.classCicle//定义圆类.{doublearea(doubler)//定义方法计算圆的面积.{return3.14*r*r;}}classTest5

packageb;publicclassc80{publicstaticvoidmain(String[]args){inta,b,c,d,e,f;for(a=1;a

定义和初始化要分清int[][]array;array=newint[][]{{1,1}{2,2}};int[][]array=newint[2][2];int[][]array=newint[][]

类似的问题,在知道里面不知道有多少.搜索一下.

publicclassTest{\x05publicstaticvoidmain(String[]args){\x05\x05Rectangler=newRectangle(5,4);\x05\x05

packagecom.test;publicclassComplexNum{\x05//Z=a+bi\x05privateintRez;\x05//实部\x05privateintImz;\x05//

importjava.util.Scanner;publicclassjiechen{publicstaticvoidmain(String[]args){Scannerscanner=newScan

public class Ring{    private double inner;//内半径  

classClock{privateinthourse;privateintminute;privateintsecond;publicClock(){this.hourse=0;this.minut

publicclassTriangle{\x09inta;\x09intb;\x09intc;\x09publicTriangle(inta,intb,intc){\x09\x09this.a=a;\

publicclassZhengfangxing{privateintl;publicZhengfangxing(intl){//有参构造函数this.l=l;}publicintgetL