java考试题_编程题答案!!!.docVIP

：：：//后面的汉字都是注释语句，不用写的 1. import java.lang.*;public static void main(String args[]){int sum=0;for(int i=1;i=100;i++){ sum=i+sum;//实现求和}System.out.println(sum);} public class Shusu {public static void main(String[] args) {int i,j;for(i=1;i=100;i++){for(j=2;ji;j++){if(i%j==0){break;}}if(i==j){System.out.println(i);}}}} 3. public class Test {public static void main(String[]args){int sum =0;int res=0;int ok=0;for(int a =1;a=9;a++){for(int b=1;b=9;b++){for(int c=1;c=9;c++){sum =100*a+10*b+c;res = a*a*a+b*b*b+c*c*c;if(sum==res){ok=sum=res;System.out.println(ok);} }}}}} 4. public class main {public static void main(String[] args) { Circle circle= new Circle();double circleR=0,circleArea=0,circlePerimeter=0;circle.setR(circleR);System.out.println(circleArea: + circle.getArea());System.out.println(circlePerimeter: + circle.getPerimeter()); }} class Circle {private double r;// 半径private double perimeter;// 周长private double area;// 面积public void setR(double r){this.r=r;}public double getArea() {// 返归面积return 3.14 * r * r;}public double getPerimeter() {// 返归周长return 3.14 * 2 * r;}} 5. public class main {public static void main(String[] args) {Trangle trangle = new Trangle();double tranglea = 1, trangleb = 1, tranglec = 1, trangleArea = 1, tranglePerimeter = 1;trangle.setA(tranglea);trangle.setB(trangleb);trangle.setC(tranglec);System.out.println(trangleArea: + trangle.getArea());System.out.println(tranglePerimeter: + trangle.getPerimeter());}} class Trangle {public Trangle() {}private double a, b, c;// 三个边private double area;// 面积private double perimeter;// 周长private double h = (a + b + c) / 2;public double getArea() {// 返归面积return Math.sqrt(h * (h - a) * (h - b) * (h - c));}public double getPerimeter() {// 返归周长return a + b + c;}public void setA(double a) {// 修改边athis.a = a;}public void setB(double b) {// 修改边bthis.b = b;}public void setC(double c) {// //修改边cthis = c;}pub