いくつかのサブ文字列に分割するJavaプログラム

この記事では、いくつかのサブ文字列に分割する方法を理解します。文字列は、1つ以上の文字を含み、二重引用符（“”）で囲まれたデータ型です。文字列の一部またはサブセットはサブ文字列と呼ばれます。

以下は同じのデモンストレーションです-

入力がであると仮定します −

Input string: JVM

必要な出力は −

The substring list printed as an ArrayList :
[J, JV, JVM, V, VM, M]

The sub-strings after splitting is:
(1) "J"
(2) "JV"
(3) "JVM"
(4) "V"
(5) "VM"
(6) "M"

アルゴリズム

Step 1 - START
Step 2 - Declare a string namely input_string, an array list namely string_list.
Step 3 - Define the values.
Step 4 - Iterate through the length of the string using two nested loops, and add every character from every string to another list. This is the result to be displayed on console.
Step 5 - To print this substring as ArrayList, initialize a counter, and iterate through the result and increment the counter after every iteration. This gives number of substrings in the string.
Step 6 - Display the result
Step 7 - Stop

例1

ここでは、「main」関数の下ですべての操作をバインドします。

import java.io.*;
import java.util.ArrayList;
public class SubString {
   public static void main(String[] args) {
      System.out.println("Required packages have been imported");
      String input_string = "JVM";
      System.out.println("The string is defined as: " +input_string);
      int i, j;
      int string_length = input_string.length();
      ArrayList<String> string_list = new ArrayList<String>();
      for (i = 0; i < string_length; i++) {
         for (j = i + 1; j <= string_length; j++) {
            string_list.add(input_string.substring(i, j));
         }
      }
      ArrayList<String> result = string_list;
      System.out.println( "\nThe substring list printed as an ArrayList : ");
      System.out.println(result);
      System.out.println( "\nThe sub-strings after splitting is: ");
      int count = 1;
      for (String it : result) {
         System.out.println("(" + count + ") \"" + it + "\"");
         count++;
      }
   }
}

出力

Required packages have been imported
The string is defined as: JVM

The substring list printed as an ArrayList :
[J, JV, JVM, V, VM, M]

The sub-strings after splitting is:
(1) "J"
(2) "JV"
(3) "JVM"
(4) "V"
(5) "VM"
(6) "M"

例2

ここでは、操作をオブジェクト指向プログラミングを示す関数にカプセル化します。

import java.io.*;
import java.util.ArrayList;
public class SubString {
   public static ArrayList<String> split_string(String input_string) {
      int i, j;
      int string_length = input_string.length();
      ArrayList<String> string_list = new ArrayList<String>();
      for (i = 0; i < string_length; i++) {
         for (j = i + 1; j <= string_length; j++) {
            string_list.add(input_string.substring(i, j));
         }
      }
      return string_list;
   }
   public static void main(String[] args) {
      System.out.println("Required packages have been imported");
      String input_string = "JVM";
      System.out.println("The string is defined as: " +input_string);
      ArrayList<String> string_list = SubString.split_string(input_string);
      System.out.println( "\nThe substring list printed as an ArrayList : ");
      System.out.println(string_list);
      System.out.println( "\nThe sub-strings after splitting is: ");
      int count = 1;
      for (String it : string_list) {
         System.out.println("(" + count + ") \"" + it + "\"");
         count++;
      }
   }
}

出力

Required packages have been imported
The string is defined as: JVM

The substring list printed as an ArrayList :
[J, JV, JVM, V, VM, M]

The sub-strings after splitting is:
(1) "J"
(2) "JV"
(3) "JVM"
(4) "V"
(5) "VM"
(6) "M"