编写一个Java应用程序,计算1-1 2 1 3-1 4 -的前100项之和

publicclassA3{publicstaticvoidmain(String[]args){for(inti=1;i

importjava.io.*;importjava.util.*;classMain{publicstaticintgcd(intm,intn){while(true){if((m=m%n)==0)

运用海伦公式dimPaslong,Saslongifa+b>cthenifb+c>athenifa+c>bthenp=(a+b+c)/2S=sqr(p*(p-a)*(p-b)*(p-c))endife

publicstaticvoidmain(String[]args){doubleresult=0;for(inti=1,j=1;i

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

输出三角形的什么啊再问：周长再答：哦，这个简单importjava.util.Scanner;publicclassCircumference{publicstaticvoidmain(String[

publicclassTest{publicstaticvoidmain(String[]args){inta=1203;intsum=0;while(a/10!=0){sum

importjava.util.Scanner;publicclassCircle{    publicstaticvoidmain(String[]args)

importjava.util.Scanner;publicclassTest{publicstaticvoidmain(String[]args){System.out.print("请输入第一个整

importjava.io.BufferedReader;importjava.io.IOException;importjava.io.InputStreamReader;importjava.ut

做回好人,回答你吧.直接看代码：importjava.io.File;importjava.io.FileInputStream;importjava.io.FileNotFoundException

我的代码：publicclassTest{publicstaticvoidmain(String[]args){inti=1;intsum=0;while(i

public class Test{    public static void main(String&nb

publicclasssum{privatedoublesum=0;publicvoidgetSum(){intj=1;for(doublei=1;i

publicclasstest{publicstaticvoidmain(Stringargs[]){System.out.println("N\t10*N\t100*N\t1000*N");for(

importjava.util.Scanner;publicclassTest{publicstaticvoidmain(String[]args){Scannersc=newScanner(Syst

test{publicstaticvoidmain(Stringargs[]){longsum=0,a=1;longi=1;while(i=1)sum=sum+a;i++;a=a*i;}System.

importjava.awt.*;importjava.applet.*;importjava.util.*;publicclassdrawTestextendsApplet{publicvoidpa

1.抽象形状类packagecom;//抽象的形状类publicabstractclassShape{}2.显示接口packagecom;//接口publicinterfaceIDisplay{vo

packagetest;publicclassTest{publicstaticvoidmain(Stringargs[]){System.out.println(getSum(123));}publ