java基础练习题目

package com.guet; //1到1000的奇数打印出来 public class JiShu { public static void main(String[] args) { // TODO Auto-generated method stub int number = 0; int now = 1; for (int i = 1; i <= 1000; i++) { if (now++ % 2 == 1) number++; } System.out.print("1到1000的奇数有"+number+"个"); } } 

public class One {// 将1到1000之间的奇数打印出来 public static void main(String[] args) { // TODO Auto-generated method stub int i; for (i = 1; i < 1001; i++) { if (i % 2 == 1) { System.out.println(i); } } } } 

package com.guet; import java.util.Scanner; //判断一个数能否同时被3和5 整除 public class ZhengChu { public static void main(String[] args) { // TODO Auto-generated method stub int number; System.out.print("输入一个数："); Scanner numScanner=new Scanner(System.in); number=numScanner.nextInt(); if(number%3==0&&number%5==0) System.out.println(number+"可以 java基础练习题目 同时被3和5 整除"); else System.out.println(number+"不能同时被3和5 整除"); } } 

import java.util.Scanner; public class Two {// 判断一个数能否同时被3和5整除 public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int x = scanner.nextInt(); if (x % 3 == 0 && x % 5 == 0) { System.out.print("可以同时被3和5整除"); } else { System.out.print("不可以同时被3和5整除"); } } } 

package com.guet; import java.util.Scanner; //输入10个数，找出最大一个数，并打印出来。 public class Max10 { public static void main(String[] args) { // TODO Auto-generated method stub int number; int temp = 0; Scanner in = new Scanner(System.in); for (int i = 1; i <= 10; i++) { System.out.print("输入第" + i + "个数："); number = in.nextInt(); if (number > temp) temp = number; } System.out.print("这10个数中最大的是：" + temp); } } 

package com.guet; import java.util.Scanner; //给出一百分制成绩，要求输出成绩等级’A’,’B’,’C’,’D’,’E’。 //90 分以上为’A’,80~89 分为’B’,70~79 分为’C’,60~69 分为’D’,60分以下为’E’ public class GradeLevel { public static void main(String[] args) { // TODO Auto-generated method stub int grade ,level; System.out.print("输入你的百分制成绩："); Scanner inScanner=new Scanner(System.in); grade=inScanner.nextInt(); if(grade>100||grade<0){ System.out.println("你输入的成绩有误"); System.exit(0); } switch (grade%10){ case 10: case 9:level=65;break;//A case 8:level=66;break;//B case 7:level=67;break;//C case 6:level=68;break; default :level=69; } 　　　　　　if(grade==100) level=65; System.out.println("你的成绩是"+(char)level); } } 

package com.google; import java.util.Scanner; //把一个正整数分解质因数 public class Five { public static void main(String[] args) { // TODO Auto-generated method stub int number , i=2; Scanner numScanner = new Scanner(System.in); System.out.print("输入一个正整数："); number = numScanner.nextInt(); System.out.print(number+"分解出的质因数有："); do{ if(number%i==0){ number=number/2; System.out.print(i+" "); }else{ i++; } }while (true); } } 

package com.google; //打印出如下图案（菱形） // * // * // * //* // * // * // * public class Diamond { public static void main(String[] args) { // TODO 自动生成的方法存根 int x, y; for (x = 1; x < 5; x++) { for (y = 1; y < (4 + x); y++) { if (y <= (4 - x))// 原始if(y<=(3+x-(2*x-1))) System.out.print(" "); else System.out.print("*"); } System.out.println(); } for (x = 5; x < 8; x++) { for (y = 1; y < 7; y++) { if ((x - 4) < y && y < (12 - x)) System.out.print("*"); else if(y<=x-4) System.out.print(" "); } System.out.println(); } } } 

package com.google; import java.util.Scanner; //将1至7 的数字转换为星期日到星期六的字符串 //这个题目目前不是很理解 public class SevenDays { public static void main(String[] args) { // TODO 自动生成的方法存根 int x; String xString = new String(); System.out.print("输入1到7其中的一个数字："); Scanner num = new Scanner(System.in); x = num.nextInt(); switch (x) { case 1: { xString = "星期日"+x; } break; case 2: { xString = "星期一"; xString = Integer.toString(x); } break; case 3: { xString = "星期二"; xString = Integer.toString(x); } break; case 4: { xString = "星期三"; xString = Integer.toString(x); } break; case 5: { xString = "星期四"; xString = Integer.toString(x); } break; case 6: { xString = "星期五"; xString = Integer.toString(x); } break; case 7: { xString = "星期六"; xString = Integer.toString(x); } break; } System.out.print("结果："+xString); } } 

import java.util.Scanner; //用程序找出每位数的立方和等于该数本身值的所有的3位数 public class Ten { public static void main(String[] args) { // TODO 自动生成的方法存根 Scanner inScanner = new Scanner(System.in); int number, number_cal, a, b, c; // 先 确定该数的位数，可代码实现，为了方便可手动从控制台输入 System.out.print("输入一个三位数数字："); number_cal = number = inScanner.nextInt(); a = number_cal / 100; number_cal = number_cal - a * 100; b = number_cal / 10; c = number_cal - b * 10; if ((a * a * a + b * b * b + c * c * c) == number) { System.out.print(number + "是水仙花数"); } else { System.out.print(number + "不是水仙花数"); } } } 

import java.util.Scanner; //计算1 加到n （ n>=2的整数）的总和 public class Eleven { public static void main(String[] args) { // TODO 自动生成的方法存根 int number, sum = 0; Scanner in = new Scanner(System.in); System.out.print("输入一个>=2的整数："); number = in.nextInt(); for (int i = 1; i <= number; i++) { sum = sum + i; } System.out.print("结果是" + sum); } } 

import java.util.Scanner; //得到一个整数的绝对值 public class Twelve { public static void main(String[] args) { // TODO 自动生成的方法存根 int number; Scanner inScanner = new Scanner(System.in); System.out.print("输入一个整数："); number = inScanner.nextInt(); if (number < 0) { number = 0 - number; } System.out.print("绝对值是：" + number); } }