Let us discuss each of these methods individually.<\/p>\n
Using the Java BufferedReader class, the readLine() method<\/h3>\n
The BufferedReader class is the most native way to take input from users. It is part of the java.io package. However, the BufferedReader class contains a method called readLine() which facilitates user input in the form of Strings.<\/p>\n
The signature of the readLine() method is given by:<\/strong><\/p>\n The readLine() method returns the string from the input buffer after removing the terminating character.<\/p>\n At first, we need to call the BufferedReader class object, which is wrapped around the System input, then using that object, we need to call the readLine method, which will facilitate the string user input.<\/p>\n The Syntax of readLine() method:<\/strong><\/p>\n Code to understand BufferedReader Input:<\/strong><\/p>\n The output of the above code:<\/strong><\/p>\n Enter a String<\/span>DataFlair String Input Tutorial<\/span><\/p>\n The String input using Scanner class is: DataFlair String Input Tutorial<\/span><\/p>\n<\/div>\n There is another implementation of the BufferedReader class, which allows the user to give input until a specified character is entered.<\/p>\n Code to take Input using BufferedReader until the User enters any specified character:<\/strong><\/p>\n The output of the above code is:<\/strong><\/p>\n Enter the Strings and when you want to stop entering the Strings, type \u2018.\u2019<\/span>Enter a String:\u00a0<\/span><\/p>\n DataFlair<\/span><\/p>\n The String input is: DataFlair<\/span><\/p>\n Enter a String:\u00a0<\/span><\/p>\n Java Tutorial<\/span><\/p>\n The String input is: Java Tutorial<\/span><\/p>\n Enter a String:\u00a0<\/span><\/p>\n Console Input<\/span><\/p>\n The String input is: Console Input<\/span><\/p>\n Enter a String:\u00a0<\/span><\/p>\n .<\/span><\/p>\n The String input is: .<\/span><\/p>\n FullStop!!!<\/span><\/p>\n<\/div>\n The Scanner class, also known as the utility scanner, is the more widely used class for taking user input. It is part of the java.util package. Also, the Scanner class contains the nextLine() method, which allows user input in the form of a string.<\/p>\n The signature of the nextLine() method is given by:<\/strong><\/p>\n The method returns the entered string from the input buffer. If the method is unable to find any string input, it throws a NoSuchElementException. Although if we close the scanner object and then try to take input, it throws an IllegalStateException.<\/p>\n First, we need to create a Scanner class object that wraps around the system input. After that, using the object, we call the nextLine() method to take String input.<\/p>\n The Syntax of the nextLine() method in Java:<\/strong><\/p>\n Code to understand the Java Scanner Class Input using nextLine():<\/strong><\/p>\n The output of the above code:<\/strong><\/p>\n Enter a String<\/span>DataFlair String Input Tutorial<\/span><\/p>\n The String input using Scanner class is: DataFlair String Input Tutorial<\/span><\/p>\n<\/div>\n The Scanner class also has another method that facilitates string input. The next() method lets the programmer take user input in the form of a string, but only accepts the string until the first space is encountered. Therefore, this method can be useful when the programmer needs to ensure that the user does not enter more than one word as input.<\/p>\n The signature of the next() method is given by:<\/strong><\/p>\n The next method basically returns the next token that it encounters, i.e., until an empty character is encountered. If there is no next token, it throws a NoSuchElementException. However, if we close the Scanner class object and then call the method, it throws an IllegalStateException.<\/p>\n Code to understand Scanner Class Input using next():<\/strong><\/p>\n The output of the above code:<\/strong><\/p>\npublic String readLine() throws IOException\r\n<\/pre>\n
BufferedReader br= new BufferedReader(new InputStreamReader(System.in));\r\nString str= br.ReadLine();\r\n<\/pre>\n
package com.DataFlair.StringInput;\r\nimport java.io.BufferedReader;\r\nimport java.io.IOException;\r\nimport java.io.InputStreamReader;\r\npublic class BufferedReaderInput\r\n{\r\n public static void main(String[] args) throws IOException \r\n {\r\n BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); \r\n System.out.println(\"Enter anything: \");\r\n String str = reader.readLine();\r\n System.out.println(\"You have Entered: \");\r\n System.out.println(str); \r\n }\r\n}\r\n<\/pre>\npackage com.DataFlair.StringInput;\r\nimport java.io.BufferedReader;\r\nimport java.io.IOException;\r\nimport java.io.InputStreamReader;\r\npublic class BufferedReaderInput2\r\n{\r\n public static void main(String[ ] args) throws IOException \r\n {\r\n BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); \r\n String str = \"\"; \r\n System.out.println(\"Enter the Strings and when you want to stop entering the Strings, type \u2018.\u2019\");\r\n while(!str.equals(\".\"))\r\n { \r\n System.out.println(\"Enter a String: \"); \r\n str = br.readLine(); \r\n System.out.println(\"The String input is: \"+str); \r\n if(str.contentEquals(\".\"))\r\n System.out.println(\"FullStop!!!\");\r\n } \r\n br.close(); \r\n } \r\n}\r\n<\/pre>\nUsing the Scanner class nextLine() method<\/h3>\n
public String nextLine()\r\n<\/pre>\n
Scanner sc = new Scanner(System.in);\r\nString str = sc.nextLine();\r\n<\/pre>\n
package com.DataFlair.StringInput;\r\nimport java.util.*;\r\npublic class ScannerClassInput\r\n{\r\n public static void main(String args[])\r\n {\r\n Scanner sc = new Scanner(System.in);\r\n System.out.println(\"Enter a String\");\r\n String str = sc.nextLine();\r\n System.out.println(\"The String input using Scanner class is: \" +str);\r\n }\r\n}\r\n<\/pre>\nUsing the Scanner Class next() method<\/h3>\n
public String next()<\/pre>\n
package com.DataFlair.StringInput;\r\nimport java.util.*;\r\npublic class ScannerClassInput\r\n{\r\n public static void main(String args[])\r\n {\r\n Scanner sc = new Scanner(System.in);\r\n System.out.println(\"Enter a String\");\r\n String str = sc.next();\r\n System.out.println(\"The String input using Scanner class is: \" +str);\r\n }\r\n}\r\n<\/pre>\n
![\"commanline](\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2022\/04\/commanline-input.webp\")
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