JAVA程序算法源代码二十例.doc

1成法口诀阵形 package pm; public class SwitchTest{ public static void main(String[] args){ for(int i=1;i=9;i++){ for(int j=1;j=i;j++){ System.out.print(j+*+i+=+(i*j)+\t); } System.out.println(); } } } 2华氏和摄氏的转换法 package pm; import java.util.Scanner; public class SwitchTest { public static void main(String[] args) { Scanner sc=new Scanner(System.in); while (true) { System.out.println(请输入要转换的温度类型：C 或 F); String s = sc.next().trim(); if (c.equalsIgnoreCase(s)) { //做摄氏向华摄的转换 System.out.println(请输入要转换摄氏的温度:..); double db = sc.nextDouble(); double db2 = (db * 9 / 5) + 32; System.out.println(对应的华氏温度： + db2 + F); } else if (f.equalsIgnoreCase(s)) { //做华摄向摄氏的转换 System.out.println(请输入要转换华氏的温度:..); double db = sc.nextDouble(); double db2 = (db - 32) * 5 / 9; System.out.println(对应的摄氏温度： + Math.round(db2) + C); }else if(exit.equalsIgnoreCase(s)){ break; } } } } package pm; import java.util.Scanner; public class SwitchTest{ public static void main(String[] args) { Scanner sc=new Scanner(System.in); boolean flag=true; while (flag) { System.out.println(请输入要转换的温度,如：50c或100f); String str = sc.nextLine().trim(); if (str.endsWith(c) || str.endsWith(C)) { //做摄氏向华摄的转换 30c String st = str.substring(0, str.length() - 1); double db = Double.parseDouble(st);//[0,2) //2 double db=Double.valueOf(st).doubleValue(); double db2 = (db * 9 / 5) + 32; System.out.println(对应的华氏温度： + db2 + F); } else if (str.endsWith(f) || str.endsWith(F)) { //做华摄向摄氏的转换 String st = str.substring(0, str.length() - 1); double db = Double.parseDouble(st);//[0,2) //2 double db=Double.valueOf(st).doubleValue(); double db2 = (db - 32) * 5 / 9; System.out.println(对应的摄氏温度： + Math.round(db2) + C); }else if(exit.equalsIgnoreCase(str)){ flag=false; } } } } 3三个数的最大数 package pm; public class SwitchTest { public static void main(String[] args) {