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import java.util.Scanner;public class book { public static void main(String[] args) { System.out.print("Enter a three-digit integer:"); Scanner input = new Scanner(System.in); int num = input.nextInt(); int old = num; if(num<0) num*=(-1); int gewei = num%10; int baiwei = num/100; if(gewei==baiwei) System.out.println(old+" is a palindrome."); else System.out.println(old+" is not a palindrome."); }} import java.util.Scanner;public class book { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("Enter the filing status:"); int status = input.nextInt(); System.out.print("Enter the taxable income:"); double income = input.nextDouble(); double tax = 0; if(status==0){ if(income<=8350) tax = income*0.1; else if(income<=33950) tax = 8350*0.1+(income-8350)*0.15; else if(income<=82250) tax = 8350*0.1+(33950-8350)*0.15+(income-33950)*0.25; else if(income<=171550) tax = 8350*0.1+(33950-8350)*0.15+(82250-33950)*0.25+(income-82250)*0.28; else if(income<=372950) tax = 8350*0.1+(33950-8350)*0.15+(82250-33950)*0.25+(171550-82250)*0.28+(income-171550)*0.33; else tax = 8350*0.1+(33950-8350)*0.15+(82250-33950)*0.25+(171550-82250)*0.28+(372950-171550)*0.33+(income-372950)*0.35; } else if(status==1) { if (income <= 16700) tax = income * 0.1; else if (income <= 67900) tax = 16700 * 0.1 + (income - 16700) * 0.15; else if (income <= 137050) tax = 16700 * 0.1 + (67900 - 16700) * 0.15 + (income - 67900) * 0.25; else if (income <= 208850) tax = 16700 * 0.1 + (67900 - 16700) * 0.15 + (137050 - 67900) * 0.25 + (income - 137050) * 0.28; else if (income <= 372950) tax = 16700 * 0.1 + (67900 - 16700) * 0.15 + (137050 - 67900) * 0.25 + (208850 - 137050) * 0.28 + (income - 208850) * 0.33; else tax = 16700 * 0.1 + (67900 - 16700) * 0.15 + (137050 - 67900) * 0.25 + (208850 - 137050) * 0.28 + (372950 - 208850) * 0.33 + (income - 372950) * 0.35; } else if(status==2) { if (income <= 8350) tax = income * 0.1; else if (income <= 33950) tax = 8350 * 0.1 + (income - 8350 )* 0.15; else if (income <= 68525) tax = 8350 * 0.1 + (33950 - 8350) * 0.15 + (income - 33950) * 0.25; else if (income <= 104425) tax = 8350 * 0.1 + (33950 - 8350) * 0.15 + (68525 - 33950) * 0.25 + (income - 68525) * 0.28; else if (income <= 186475) tax = 8350 * 0.1 + (33950 - 8350) * 0.15 + (68525 - 33950) * 0.25 + (104425 - 68525) * 0.28 + (income - 104425) * 0.33; else tax = 8350 * 0.1 + (33950 - 8350) * 0.15 + (68525 - 33950) * 0.25 + (104425 - 68525) * 0.28 + (186475 - 104425) * 0.33 + (income - 186475) * 0.35; } else if(status==3) { if (income <= 11950) tax = income * 0.1; else if (income <= 45500) tax = 11950 * 0.1 + (income - 11950 )* 0.15; else if (income <= 117450) tax = 11950 * 0.1 + (45500 - 11950) * 0.15 + (income - 45500) * 0.25; else if (income <= 190200) tax = 11950 * 0.1 + (45500 - 11950) * 0.15 + (117450 - 45500) * 0.25 + (income - 117450) * 0.28; else if (income <= 372950) tax = 11950 * 0.1 + (45500 - 11950) * 0.15 + (117450 - 45500) * 0.25 + (190200 - 117450) * 0.28 + (income - 190200) * 0.33; else tax = 11950 * 0.1 + (45500 - 11950) * 0.15 + (117450 - 45500) * 0.25 + (190200 - 117450) * 0.28 + (372950 - 190200) * 0.33 + (income - 372950) * 0.35; } System.out.println("Tax is "+(int)(tax*100)/100.0); }} import java.util.Scanner;public class book { public static void main(String[] args) { int coin = (int)(Math.random()*2); System.out.print("Guess: "); Scanner input = new Scanner(System.in); int g = input.nextInt(); if(g==coin) System.out.println("You are right, coin is "+coin); else System.out.println("You are wrong, coin is "+coin); }} import java.util.Scanner;public class book { public static void main(String[] args) { int lottery = (int)(Math.random()*1000); int ld1 = lottery%10; int ld2 = lottery/10%10; int ld3 = lottery/100%10; Scanner input = new Scanner(System.in); System.out.print("Enter your pick: "); int guess = input.nextInt(); int g1 = guess%10; int g2 = guess/10%10; int g3 = guess/100%10; System.out.println("The lottery number is "+lottery); if(guess==lottery) System.out.println("you win $10,000"); else if((g1==ld1&&g2==ld3&&g3==ld2)||(g1==ld2&&g2==ld1&&g3==ld3)||(g1==ld2&&g2==ld3&&g3==ld1)||(g1==ld3&&g2==ld1&&g3==ld2)||(g1==ld3&&g2==ld2&&g3==ld1)) System.out.println("you win $3000"); else if(g1==ld1||g1==ld2||g1==ld3||g2==ld1||g2==ld2||g2==ld3||g3==ld1||g3==ld2||g3==ld3) System.out.println("you win $1000"); else System.out.println("bad luck!"); }} public class book { public static void main(String[] args) { int x = (int)(Math.random()*100)-50; int y = (int)(Math.random()*200)-100; System.out.println("The random point is ("+x+","+y+")"); }} import java.util.Scanner;public class book { public static void main(String[] args) { System.out.print("scissor(0), rock(1), paper(2):"); Scanner input = new Scanner(System.in); int player = input.nextInt(); int com = (int)(Math.random()*3); String[] names = { "scissor","rock","paper"}; if(com==player) System.out.println("The computer is "+names[com]+". You are "+names[player]+" too. It is a draw."); else{ System.out.print("The computer is "+names[com]+". You are "+names[player]+". You "); String result = ""; if((com==0&&player==1)||(com==1&&player==2)||(com==2&&player==0)) result="win"; else result="lose"; System.out.println(result); } }} import java.util.Scanner;public class book { public static void main(String[] args) { System.out.print("Enter the weight:"); Scanner input = new Scanner(System.in); double w = input.nextDouble(); double c = 0; if(w>20) System.out.println("the package cannot be shipped"); else if(w<=0) System.out.println("Invalid input"); else if(w<=1) c=3.5; else if(w<=3) c=5.5; else if(w<=10) c=8.5; else if(w<=20) c=10.5; if(c!=0) System.out.println("The cost is "+c); }} import java.util.Scanner;public class book { public static void main(String[] args) { System.out.print("Enter the three lengths:"); Scanner input = new Scanner(System.in); double a = input.nextDouble(); double b = input.nextDouble(); double c = input.nextDouble(); double cir = a+b+c; if((2*a>=cir)||(2*b>=cir)||(2*c>=cir)) System.out.println("Invalid input"); else System.out.println("The circumference is "+cir); }} import java.util.Scanner;public class book { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("Enter the temperature: "); double t = input.nextDouble(); System.out.print("Enter the velocity: "); double v = input.nextDouble(); double twc = 35.74+0.6215*t-35.75*Math.pow(v,0.16)+0.4275*t*Math.pow(v,0.16); if(t>=-58&&t<=41&v>=2) System.out.println("The twc is "+twc); else System.out.println("Invalid input."); }} import java.util.Scanner;public class book { public static void main(String[] args) { int[] mdays = { 31,28,31,30,31,30,31,31,30,31,30,31}; Scanner input = new Scanner(System.in); System.out.print("Enter year: (e,g.,2012):"); int year = input.nextInt(); System.out.print("Enter month: 1-12: "); int month = input.nextInt(); if((year%4==0&&year%100!=0)||(year%400==0)) mdays[1]=29; System.out.print("Enter the day of the month: 1-"+mdays[month-1]+": "); int q = input.nextInt(); if(month==1||month==2){ month+=12; year--; } int h=(q+26*(month+1)/10+year%100+year%100/4+year/100/4+5*(year/100))%7; String[] days = { "Sat","Sun","Mon","Tue","Wed","Thu","Fri"}; System.out.println("Day of the week is "+days[h]); }} import java.util.Scanner;public class book { public static void main(String[] args) { System.out.print("Enter a point with two coordinates: "); Scanner input = new Scanner(System.in); double x = input.nextDouble(); double y = input.nextDouble(); if(x*x+y*y>100) System.out.println("Point ("+x+", "+y+") is not in the circle"); else System.out.println("Point ("+x+", "+y+") is in the circle"); }} import java.util.Scanner;public class book { public static void main(String[] args) { System.out.print("Enter a point with two coordinates: "); Scanner input = new Scanner(System.in); double x = input.nextDouble(); double y = input.nextDouble(); if(x<=10/2&&x>=-10/2&&y<=5.0/2&&y>=-5.0/2) System.out.println("Point ("+x+", "+y+") is in the rectangle"); else System.out.println("Point ("+x+", "+y+") is not in the rectangle"); }} 转载地址：http://ekwai.baihongyu.com/