高分，在线等。编写JAVA代码，实现一个字符串的第一个逗号查找 java如何实现在一个字符串中查找另一个字符串
\u7b2c\u4e00\u4e2a\u7b2c\u4e8cjava\u4ee3\u7801\uff01\u5728\u7ebf\u7b49public class FileTest {
public static void main(String[] args) throws IOException {
FileInputStream fis = new FileInputStream(new File("D:/tmp/file1.txt"));
FileOutputStream fos = new FileOutputStream(new File("D:/tmp/file2.txt"));
byte[] buf = new byte[1024];
int i = 0;
while ((i = fis.read(buf)) != -1) {
fos.write(buf, 0, i);
buf = new byte[1024];
}
fis.close();
fos.close();
}
}
\u5df2\u6d4b\uff0c\u53ef\u7528\u3002\u6ca1\u6709\u5904\u7406\u5f02\u5e38\u3002\u77e5\u9053\u56de\u7b54\u7c98\u8d34\u4ee3\u7801\u6ca1\u6709\u683c\u5f0f\uff0c\u5e0c\u671b\u80fd\u5e2e\u4f60\u5230\u4f60\uff0c\u51d1\u5408\u770b\u5427\u3002
\u540c\u697c\u4e0a\uff0c\u6ca1\u9519\uff0c\u6ca1\u5fc5\u8981\u5d4c\u5957\uff0c\u7528indexOf\u5373\u53ef\uff0c\u4e0d\u8fc7\u5982\u679c\u697c\u4e3b\u60f3\u8981\u81ea\u5df1\u5b9e\u73b0\u7684\u8bdd\uff0c\u5c31\u66f4\u5f53\u522b\u8bba\u4e86\u3002\u7ed9\u4e2a\u601d\u8def\u5c31\u662f\u628a\u4e24\u4e2a\u5b57\u7b26\u4e32\u6362\u6210\u4e24\u4e2a\u5b57\u7b26\u6570\u7ec4\uff0c\u7136\u540e\u5bf9\u4e24\u4e2a\u6570\u7ec4\u7684\u9996\u5b57\u7b26\u8fdb\u884c\u5339\u914d\uff0c\u5982\u679c\u76f8\u540c\u5219\u5bf9\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u8fdb\u884c\u5339\u914d\u3002\u8fd9\u6837\u7684\u8bdd\u53ef\u80fd\u9700\u8981\u5d4c\u5957\u5faa\u73af\u3002\u8fd9\u79cd\u7b97\u662f\u6548\u7387\u6700\u4f4e\u7684\u65b9\u5f0f\u4e86\uff0c\u4e0d\u77e5\u9053\u6709\u6ca1\u6709\u66f4\u597d\u7684\u65b9\u6cd5\u81ea\u5df1\u5b9e\u73b0\u5b57\u7b26\u4e32\u5339\u914d\uff0c\u540c\u6c42\u3002
private static String str = "5,95,137.5,125";
public static void main(String[] args) {
String first = str.substring(0, str.indexOf(","));
int firstNum = Integer.parseInt(first);
if(firstNum > 5) {
System.out.println(1);
}else if(firstNum == 5) {
System.out.println(0);
}else {
System.out.println(2);
}
}
String str="5,95,137.5,125";
String[] ss=str.split(",");//剩下的不用说了吧。
if(str.subString(str.length-1,str.length).equals(","){
//说明最后一位为逗号
}else{
}
绛旓細private static String str = "5,95,137.5,125";public static void main(String[] args) {String first = str.substring(0, str.indexOf(","));int firstNum = Integer.parseInt(first);if(firstNum > 5) {System.out.println(1);}else if(firstNum == 5) {System.out.println(0);...
绛旓細/ 缂栧啓涓涓叕鍙稿憳宸ョ被锛氭垚鍛樺彉閲忥細鍛樺伐鍙枫佸鍚嶃佽柂姘淬侀儴闂ㄣ傛垚鍛樻柟娉曪細a.鍒╃敤鏋勯犳柟娉曞畬鎴愯缃俊鎭細•鍗曞弬锛屽彧浼犻掑憳宸ュ彿锛屽垯鍛樺伐濮撳悕锛氭棤鍚嶆皬锛岃柂姘达細0锛岄儴闂細鏈畾銆•鍙屽弬锛屼紶閫掑憳宸ュ彿锛屽鍚嶏紝鍒欏憳宸ヨ柂姘翠负1000锛岄儴闂細鍚庡嫟銆•4鍙傦紝浼犻掑憳宸ュ彿锛屽鍚嶏紝钖按锛岄儴闂ㄣ•鏃...
绛旓細import java.util.Scanner;public class Test { public static void main(String[] args){ Scanner sc = new Scanner(System.in);int A,B;A=sc.nextInt();B=sc.nextInt(); System.out.println(A*B);sc.close();} }
绛旓細鏂板缓涓涓猄tudent.java绫锛屼唬鐮濡備笅锛歱ublic class Student { // 娉ㄥ唽鍙枫佸鍚嶃佹暟瀛︺佸璇佽绠楁満璇剧▼鎴愮哗 private String id;private String name;private Integer maths;private Integer english;private Integer computer;public Student() { } public Student(String id, String name, Integer maths, I...
绛旓細绠鍗鍐浜嗕竴涓嬶細import java.util.*;public class test {public static void reverseString(String str) {if (str.length() == 1) {System.out.print(str);} else {String subString1 = str.substring(0, str.length() - 1);String subString2 = str.substring(str.length() - 1);System....
绛旓細this.clearWindow=true;}public String getStuName() {return stuName;}public void setStuName(String stuName) {this.stuName = stuName;}public boolean isClearFloor() {return clearFloor;}public void setClearFloor(boolean clearFloor) {this.clearFloor = clearFloor;}public boolean isClear...
绛旓細Java Excel API鏃㈠彲浠ヤ粠鏈湴鏂囦欢绯荤粺鐨勪竴涓枃浠(.xls)锛屼篃鍙互浠庤緭鍏ユ祦涓鍙朎xcel鏁版嵁琛ㄣ傝鍙朎xcel鏁版嵁琛ㄧ殑绗竴姝ユ槸鍒涘缓Workbook(鏈锛氬伐浣滆杽)锛屼笅闈㈢殑浠ｇ爜鐗囨涓句緥璇存槑浜嗗簲璇ュ浣曟搷浣 import java.io.*;import jxl.*;鈥 鈥 鈥 鈥ry { //鏋勫缓Workbook瀵硅薄, 鍙Workbook瀵硅薄 //鐩存帴浠庢湰鍦版枃浠...
绛旓細涓嬮潰鏄綘瑕佺殑浠ｇ爜,骞朵笖涓轰綘鎻愪緵浜嗗崟鍏冩祴璇曚唬鐮.package test;import junit.framework.TestCase;public class Jtest extends TestCase { Number fraction;Number complex;Override protected void setUp() throws Exception { fraction=new Fraction(5,3);complex=new Complex(3,4);} Override protected ...
绛旓細int[] arr={52,26,97,19,66,8,49};void arrayAdd()//灏200鎻掑叆26涔嬪悗锛堢涓変綅锛墈 //閫氳繃System.arraycopy鏂规硶瀹炵幇鏁扮粍鐨勫鍒 int[] arr2=new int[arr.length+1];System.arraycopy(arr,0,arr2,0,2);arr2[2]=200;System.arraycopy(arr,2,arr2,3,5);//杈撳嚭缁撴灉 for(int i=0;i...
绛旓細import java.util.regex.Pattern;public class TestDD { public static void main(String[] args) { try{ String sx = args[0].trim();String sy = args[1].trim();Pattern pattern = Pattern.compile("[0-9]+");Matcher match1 = pattern.matcher(sx);Matcher match2 = pattern.matcher(...
