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【java*編程】請教各位高手下面兩個(gè)程序怎么寫(java語言）？

Java

修養(yǎng)生息的Lueasy 2016-11-09 10:17:02

??1、編寫一個(gè)Java應(yīng)用程序：Ex3_1.java，對下面的明文進(jìn)行加密處理并輸出：“OPERATION OVERLORD: THE NORMANDY LANDINGS WILL TAKE PLACE ON JUNE? 6th ,1944,AT 6:30”加密規(guī)則如下：1）? 大寫英文字母轉(zhuǎn)換為該字母后序第五字母，如A轉(zhuǎn)換為F、B轉(zhuǎn)換為G；超出了字母Z，則循環(huán)到A開始，如X轉(zhuǎn)換為C2）? 數(shù)字符轉(zhuǎn)換為該數(shù)字符后續(xù)第三數(shù)字符，如0轉(zhuǎn)換為3，1轉(zhuǎn)換為4；超出了數(shù)字符9，則循環(huán)到0開始，如8轉(zhuǎn)換為12、編程Ex3_3.java：給定字符串“The past is gone and static. Nothing we can do will change it. The future is before us and dynamic. Everything we do will affect it.”，請統(tǒng)計(jì)指定單詞“we”出現(xiàn)的頻率（次數(shù)），并將單詞“we”全部改成“you”。

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1 回答

蜂之谷

TA貢獻(xiàn)564條經(jīng)驗(yàn) 獲得超863個(gè)贊

public?static?void?demo1(String?str){
		if(str?==?null?||?str.trim().length()?==?0){
			System.out.println("參數(shù)錯(cuò)誤");
			return;
		}
		String?newStr?=?"";
		for?(int?i?=?0;?i?<?str.length();?i++)?{
			char?c?=?str.charAt(i);
			if?(Character.isUpperCase(c))?{
				char?c1;
				if(c?==?'V'){
					c1='A';
				}else?if(c?==?'W'){
					c1='B';
				}else?if(c?==?'X'){
					c1='C';
				}else?if(c?==?'Y'){
					c1='D';
				}else?if(c?==?'Z'){
					c1='E';
				}else{
					c1?=?c+=5;
				}
				newStr?+=?c1;
			}else?if(Character.isDigit(c)){
				
				char?c2;
				if(c?==?'7'){
					c2='0';
				}else?if(c?==?'8'){
					c2='1';
				}else?if(c?==?'9'){
					c2='2';
				}else{
					c2?=?c+=3;
				}
				newStr?+=?c2;
			}else{
				newStr?+=?c;
			}
		}
		System.out.println(newStr);
	}

超出字母或數(shù)字暫時(shí)沒想到好的辦法

public?static?void?demo2(String?str){
		String[]?arr?=?str.replace(".",?"").split("?");
		int?count?=?0;
		for?(int?i?=?0;?i?<?arr.length;?i++)?{
			//System.out.println(arr[i]);
			if?(arr[i].equals("we"))?{
				count++;
			}
		}
		str?=?str.replace("we",?"you");
		System.out.println("we出現(xiàn)次數(shù)："+count);
		System.out.println("替換后："+str);
	}

反對回復(fù) 2016-11-09