通过Java实现统计输入字符串中以“,”分割的各种单词的出现次数。
如:“oracle, oracle,sql,mysql,db2,oracle,mysql,db2,oracle”
则程序输出的结果为如:oralce x 个 第 x 个位置
sql x 个 第 x 个位置
如:“oracle, oracle,sql,mysql,db2,oracle,mysql,db2,oracle”
则程序输出的结果为如:oralce x 个 第 x 个位置
sql x 个 第 x 个位置
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
public class Count {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("请输入待统计的字符串:");
String str = input.next();
String[] temp = str.split(",");
Map<String, Integer> result = new HashMap<String, Integer>();
int i;
//计算每个字符串有多少个
for(String s : temp) {
if(result.get(s) == null) {
result.put(s, 1);
} else {
i = result.get(s);
result.remove(s);
result.put(s, i + 1);
}
}
//打印出每个字符有多少个,及其位置
i = 0;
for(String s : temp) {
i++;
System.out.println(s + " " + result.get(s) + "个 第" + i + "个位置");
}
}
}
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.Map.Entry;public class Count {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("请输入待统计的字符串:");
String str = input.next();
String[] temp = str.split(",");
Map<String, List<Integer>> result = new HashMap<String, List<Integer>>();
List<Integer> tempList;
for (int i = 0; i < temp.length; i++) {
String s = temp[i];
if (result.get(s) == null) {
tempList = new ArrayList<Integer>();
tempList.add(i+1);
result.put(s, tempList);
} else {
result.get(s).add(i+1);
}
tempList = null;
}
for (Entry<String, List<Integer>> entry : result.entrySet()) {
System.out.println(entry.getKey() + ";" + entry.getValue());
}
}
}
String str="oracle, oracle,sql,mysql,db2,oracle,mysql,db2,oracle";
Matcher m1=Pattern.compile("oracle").matcher(str);
Matcher m2=Pattern.compile("sql").matcher(str);
int i,j;
while(m1.find()) {
System.out.println("oracle第"+m1.start()+"个位置");
i++;
}
System.out.println(i+"个oracle");
while(m2.find()) {
System.out.println("sql第"+m2.start()+"个位置");
j++;
}
System.out.println(j+"个sql");
import java.util.Map;
import java.util.Scanner;public class csdn { public static void main(String[] args) {
Scanner s = new Scanner(System.in);
System.out.println("请输入一串字符:");
String st =s.next();
String []a = st.split(",");
Map<String,Integer> m = new HashMap<String,Integer>();
for(int i=0;i<a.length;i++){
if(!m.containsKey(a[i])){
m.put(a[i], 1);
}else{
int n = m.get(a[i]);
m.put(a[i], n+1);
}
}
System.out.println(m);
}}
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
public class csdn {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
System.out.println("请输入一串字符:");
String st =s.next();
String []a = st.split(",");
Map<String,Integer> m = new HashMap<String,Integer>();
for(int i=0;i<a.length;i++){
if(!m.containsKey(a[i])){
m.put(a[i], 1);
}else{
int n = m.get(a[i]);
m.put(a[i], n+1);
}
}
System.out.println(m);
}}
package com.test.t0916;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.Map.Entry;public class Test3 {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println("输入字符串:");
String str = in.next();
String[] str1 = str.split(",");
Map<String, List<Integer>> list = new HashMap<String, List<Integer>>();
List<Integer> tempList;
for (int i = 0; i < str1.length; i++) {
String s = str1[i];
if (list.get(s) == null) {
tempList = new ArrayList<Integer>();
tempList.add(i+1);
list.put(s, tempList);
} else {
list.get(s).add(i+1);
}
tempList = null;
}
for (Entry<String, List<Integer>> entry : list.entrySet()) {
System.out.println(entry.getKey() + " "+entry.getValue().size() + "个;第" + entry.getValue()+"的位置");
}
}
}