从键盘输入一串字符串，编写一个java程序实现统计，输出有几个大写字母，几个小写字母，和几个数字？ 编写一个程序，从键盘上输入一串字符串，分别统计字符串中大写字...
\u4ece\u952e\u76d8\u8f93\u5165\u4e00\u4e32\u5b57\u7b26\u4e32\uff0c\u7f16\u5199\u4e00\u4e2ajava\u7a0b\u5e8f\u5b9e\u73b0\u7edf\u8ba1\uff0c\u8f93\u51fa\u6709\u51e0\u4e2a\u5927\u5199\u5b57\u6bcd\uff0c\u51e0\u4e2a\u5c0f\u5199\u5b57\u6bcd\uff0c\u548c\u51e0\u4e2a\u6570\u5b57,\u5e76\u628a\u5927\u8fd9\u4e2a\u662f\u5904\u7406\u6587\u4ef6\u7684\u7c7bFileUtil\uff1a
=================================================
package org.xhome.leon.test;
import java.io.*;
public class FileUtil {
FileReader fr;
BufferedReader br;
FileWriter fw;
BufferedWriter bw;
String source = "";
public int upCaseNum = 0;
public int lowerCaseNum = 0;
public int numerNum = 0;
public int otherNum = 0;
public void initReaders(String fileName) throws FileNotFoundException {
fr = new FileReader(fileName);
br = new BufferedReader(fr);
}
public void initWriters(String fileName) throws IOException {
fw = new FileWriter(fileName);
bw = new BufferedWriter(fw);
}
public void readFile(String fileName) throws FileNotFoundException {
this.initReaders(fileName);
this.source = "";
upCaseNum = 0;
lowerCaseNum = 0;
numerNum = 0;
otherNum = 0;
String sr;
try {
while ((sr = br.readLine()) != null) {
source = source.concat(sr);
}
if (source != null) {
char[] myChars = source.trim().toCharArray();
for (int i = 0; i < myChars.length; i++) {
if (myChars[i] >= 'a' && myChars[i] <= 'z') {
lowerCaseNum++;
} else if (myChars[i] >= 'A' && myChars[i] <= 'Z') {
upCaseNum++;
} else if (myChars[i] >= '0' && myChars[i] <= '9') {
numerNum++;
} else {
otherNum++;
}
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
this.closeReaderIO();
}
}
public void writeFile(String infileName,String outfileName, boolean isToUperCase) throws IOException {
this.initWriters(outfileName);
this.initReaders(infileName);
String st;
try {
if (isToUperCase) {
while ((st = br.readLine()) != null) {
st = st.toUpperCase();
try {
bw.write(st);
bw.newLine();
bw.flush();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
} else {
while ((st = br.readLine()) != null) {
st = st.toLowerCase();
try {
bw.write(st);
bw.newLine();
bw.flush();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
this.closeReaderIO();
this.closeWriterIO();
}
}
public void closeReaderIO() {
if (this.fr != null) {
try {
this.fr.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (this.br != null) {
try {
this.br.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public void closeWriterIO() {
if (this.fw != null) {
try {
this.fw.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (this.bw != null) {
try {
this.bw.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
\u4e0b\u9762\u662f\u754c\u9762\u7f16\u5199\u7684\u7c7b\uff1a
=========================================================
package org.xhome.leon.view;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileNotFoundException;
import java.io.IOException;
import javax.swing.*;
import org.xhome.leon.test.FileUtil;
public class MainView extends JFrame{
JPanel upPanel = new JPanel();
JPanel downPanel = new JPanel();
JLabel rlabel = new JLabel("\u8bfb\u5165\u6587\u4ef6\u7edd\u5bf9\u8def\u5f84");
JLabel wlabel = new JLabel("\u5199\u51fa\u6587\u4ef6\u7edd\u5bf9\u8def\u5f84");
JTextField rjtf = new JTextField();
JTextField wjtf = new JTextField();
JButton rbtn = new JButton("\u8bfb\u53d6");
JButton wbtn = new JButton("\u5199\u5165");
JButton upORlow = new JButton("\u5c0f\u5199\u65b9\u5f0f\u5199\u5165");
JSplitPane jsp;
JTextArea jta = new JTextArea();
boolean isUperCase = false;
FileUtil ft;
public MainView(){
ft = new FileUtil();
this.setBounds(200, 100, 600, 400);
this.init();
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JOptionPane.showMessageDialog(this, "\u8bf7\u6ce8\u610f\uff0c\u6587\u4ef6\u8def\u5f84\u5206\u9694\u7b26\u4e3a / ,\u800c\u975e \\,\u6bd4\u5982D\u76d8\u4e0b\u7684test.txt\n\u4e3aD:/test.txt");
}
public void init(){
upPanel.setLayout(null);
rlabel.setBounds(5, 5, 150, 30);
wlabel.setBounds(5, 80, 150, 30);
rjtf.setBounds(165, 5, 215, 30);
wjtf.setBounds(165, 80, 215, 30);
rbtn.setBounds(505, 5, 60, 30);
wbtn.setBounds(505, 80, 60, 30);
upORlow.setBounds(5, 120, 120, 30);
rbtn.addActionListener(new MyButtonListener());
wbtn.addActionListener(new MyButtonListener());
upORlow.addActionListener(new MyButtonListener());
upPanel.add(rlabel);
upPanel.add(wlabel);
upPanel.add(rjtf);
upPanel.add(wjtf);
upPanel.add(rbtn);
upPanel.add(wbtn);
upPanel.add(upORlow);
jta.setEditable(false);
downPanel.add(jta);
jsp = new JSplitPane(JSplitPane.VERTICAL_SPLIT, upPanel, downPanel);
jsp.setDividerLocation(170);
jsp.setEnabled(false);
this.add(jsp);
}
class MyButtonListener implements ActionListener{
public void actionPerformed(ActionEvent e) {
if(e.getSource().equals(rbtn)){
try {
ft.readFile(rjtf.getText().toString().trim());
jta.setText("\u5927\u5199\u5b57\u6bcd\uff1a"+ft.upCaseNum+"\n\n");
jta.append("\u5c0f\u5199\u5b57\u6bcd\uff1a"+ft.lowerCaseNum+"\n\n");
jta.append("\u6570\u5b57\uff1a"+ft.numerNum+"\n\n");
jta.append("\u5176\u4ed6\uff1a"+ft.otherNum+"\n\n");
} catch (FileNotFoundException e1) {
JOptionPane.showMessageDialog(MainView.this, "\u8bfb\u53d6\u9519\u8bef\uff0c\u8bf7\u786e\u8ba4\u6587\u4ef6\u8def\u5f84\u662f\u5426\u6b63\u786e");
return;
}
}
else if(e.getSource().equals(wbtn)){
String inFile = rjtf.getText().toString().trim();
if(inFile != null && !inFile.equals("")){
try {
ft.writeFile(inFile, wjtf.getText().toString().trim(), isUperCase);
JOptionPane.showMessageDialog(MainView.this, "\u5199\u5165\u6210\u529f\uff01");
} catch (IOException e1) {
JOptionPane.showMessageDialog(MainView.this, "\u5199\u5165\u9519\u8bef\uff0c\u8bf7\u786e\u8ba4\u6587\u4ef6\u8def\u5f84\u662f\u5426\u6b63\u786e");
return;
}
}
}
else if(e.getSource().equals(upORlow)){
if(isUperCase){
isUperCase = false;
upORlow.setText("\u5c0f\u5199\u65b9\u5f0f\u5199\u5165");
}
else{
isUperCase = true;
upORlow.setText("\u5927\u5199\u65b9\u5f0f\u5199\u5165");
}
}
}
}
}
===============================================
\u4e0b\u9762\u662f\u4e00\u4e2a\u88c5main\u65b9\u6cd5\u7684\u7c7b\uff1a
package org.xhome.leon.main;
import org.xhome.leon.view.MainView;
public class Launcher {
public static void main(String[] args) {
new MainView();
}
}
======================================
\u4e0b\u9762\u662f\u6211\u7528\u81ea\u5df1\u5199\u7684\u90a3\u4e2ajava\u6587\u4ef6\u6d4b\u8bd5\u7684\u7ed3\u679c\u622a\u56fe\uff1a
=======================================
ps\uff1a\u8fd9\u4e2a\u662f\u770b\u4e86\u697c\u4e3b\u7684\u8981\u6c42\u540e\u5199\u7684\u3002\u7528\u7684\u662f\u7a97\u53e3\u7a0b\u5e8f\u5b9e\u73b0\uff0c\u5982\u679c\u4e0d\u7528\u754c\u9762\uff0c\u4f60\u53ef\u4ee5\u76f4\u63a5\u7528FileUtil\u8fd9\u4e2a\u7c7b\u8fdb\u884c\u64cd\u4f5c\u5c31\u53ef\u4ee5\u4e86\u3002 \u5e0c\u671b\u5bf9\u4f60\u7528\u5e2e\u52a9 ^ ^
java \u8bed\u8a00\u53ef\u4ee5\u4e48\uff1f
import java.util.*;
public class charc {
public static void main(String[] args) {
int letter=0,digit=0,space=0;
Scanner sc=new Scanner(System.in);
System.out.println("\u8bf7\u8f93\u5165\u4e00\u884c\u5b57\u7b26");
String str=sc.nextLine();
char[] ch=str.toCharArray();
for(int i=0;i<ch.length;i++){
if(Character.isDigit(ch[i])){
digit++;
}
if(Character.isLetter(ch[i])){
letter++;
}
if(Character.isSpaceChar(ch[i])){
space++;
}
}
System.out.println("\u8f93\u51fa\u6709\u6709"+digit+"\u4e2a\u6570\u5b57");
System.out.println("\u8f93\u51fa\u6709\u6709"+letter+"\u4e2a\u5b57\u6bcd");
System.out.println("\u8f93\u51fa\u6709\u6709"+space+"\u4e2a\u7a7a\u683c");
}
}
\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a
\u8bf7\u8f93\u5165\u4e00\u884c\u5b57\u7b26
qre 123 r
\u8f93\u51fa\u6709\u67093\u4e2a\u6570\u5b57
\u8f93\u51fa\u6709\u67094\u4e2a\u5b57\u6bcd
\u8f93\u51fa\u6709\u67092\u4e2a\u7a7a\u683c
public class Static{private String input;
private int bLetter =0;private int sLetter =0;private int numbers =0;private int others =0;private int spaces =0;
public Static(){ this.getString(); char[] list = charsOfString(input);
for (int i=0;i<list.length ;i++ ) { int flag = letterToCode(list[i]);
if(flag>=65 && flag<=90) //注意：这里是大写字母的ASCII码值范围，下面一样 { bLetter += 1 ; } else if (flag>=97 && flag<=122) { sLetter += 1; } else if (flag>=48 && flag<=57) { numbers += 1; } else if (flag == 32) { spaces += 1; } else { others += 1; } }
System.out.println("您输入的字符串中的大写字母有："+bLetter); System.out.println("您输入的字符串中的小写字母有："+sLetter); System.out.println("您输入的字符串中的数字有："+numbers); System.out.println("您输入的字符串中的空格有："+spaces); System.out.println("您输入的字符串中的其他字符有："+others);
}
public static void main(String args[]){ new Static();}
/*** 该方法获取一组字符串*/public void getString(){ BufferedReader in = new BufferedReader( new InputStreamReader(System.in)); System.out.println("请输入一串字符串:");
try { this.input = in.readLine(); } catch (Exception e) { System.out.println(e); }} /*** 该方法返货该字符串的各个字符到一个数组里* 这里我打算用ArrayList的，但是他只能保存为Object类型* 就是不知道怎么把Object转换为char,所以，这里就用char[]*/public char[] charsOfString(String s){ char[] list = new char[s.length()];
for (int i=0 ;i<s.length() ;i++ ) { list[i] = s.charAt(i); }
return list;} /*** 该方法获将字母转换为对应ASCII码*/public int letterToCode(char ch){ int s = ch; return s; }}
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