StdIn (Introduction to Programming in Java

java.lang.Object
- edu.princeton.cs.introcs.StdIn

```
public final class StdIn
extends Object
```
Standard input. This class provides methods for reading strings and numbers from standard input. See Section 1.5 of Introduction to Programming in Java: An Interdisciplinary Approach by Robert Sedgewick and Kevin Wayne.
See the technical information in the documentation of the In class, which applies to this class as well.

Author:

Robert Sedgewick, Kevin Wayne

Method Summary

Methods
Modifier and Type	Method and Description
`static boolean`	`hasNextChar()` Is the input empty (including whitespace)? Use this to know whether the next call to `readChar()` will succeed.
`static boolean`	`hasNextLine()` Does the input have a next line? Use this to know whether the next call to `readLine()` will succeed.
`static boolean`	`isEmpty()` Is the input empty (except possibly for whitespace)? Use this to know whether the next call to `readString()`, `readDouble()`, etc will succeed.
`static void`	`main(String[] args)` Interactive test of basic functionality.
`static String`	`readAll()` Read and return the remainder of the input as a string.
`static double[]`	`readAllDoubles()` Read all doubles until the end of input is reached, and return them.
`static int[]`	`readAllInts()` Read all ints until the end of input is reached, and return them.
`static String[]`	`readAllStrings()` Read all strings until the end of input is reached, and return them.
`static boolean`	`readBoolean()` Read and return the next boolean, allowing case-insensitive "true" or "1" for true, and "false" or "0" for false.
`static byte`	`readByte()` Read and return the next byte.
`static char`	`readChar()` Read and return the next character.
`static double`	`readDouble()` Read and return the next double.
`static double[]`	`readDoubles()` Deprecated. For more consistency, use `readAllDoubles()`
`static float`	`readFloat()` Read and return the next float.
`static int`	`readInt()` Read and return the next int.
`static int[]`	`readInts()` Deprecated. For more consistency, use `readAllInts()`
`static String`	`readLine()` Read and return the next line.
`static long`	`readLong()` Read and return the next long.
`static short`	`readShort()` Read and return the next short.
`static String`	`readString()` Read and return the next string.
`static String[]`	`readStrings()` Deprecated. For more consistency, use `readAllStrings()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - isEmpty
```
public static boolean isEmpty()
```
    Is the input empty (except possibly for whitespace)? Use this to know whether the next call to readString(), readDouble(), etc will succeed.
  - hasNextLine
```
public static boolean hasNextLine()
```
    Does the input have a next line? Use this to know whether the next call to readLine() will succeed.
    Functionally equivalent to hasNextChar().
  - hasNextChar
```
public static boolean hasNextChar()
```
    Is the input empty (including whitespace)? Use this to know whether the next call to readChar() will succeed.
    Functionally equivalent to hasNextLine().
  - readLine
```
public static String readLine()
```
    Read and return the next line.
  - readChar
```
public static char readChar()
```
    Read and return the next character.
  - readAll
```
public static String readAll()
```
    Read and return the remainder of the input as a string.
  - readString
```
public static String readString()
```
    Read and return the next string.
  - readInt
```
public static int readInt()
```
    Read and return the next int.
  - readDouble
```
public static double readDouble()
```
    Read and return the next double.
  - readFloat
```
public static float readFloat()
```
    Read and return the next float.
  - readLong
```
public static long readLong()
```
    Read and return the next long.
  - readShort
```
public static short readShort()
```
    Read and return the next short.
  - readByte
```
public static byte readByte()
```
    Read and return the next byte.
  - readBoolean
```
public static boolean readBoolean()
```
    Read and return the next boolean, allowing case-insensitive "true" or "1" for true, and "false" or "0" for false.
  - readAllStrings
```
public static String[] readAllStrings()
```
    Read all strings until the end of input is reached, and return them.
  - readAllInts
```
public static int[] readAllInts()
```
    Read all ints until the end of input is reached, and return them.
  - readAllDoubles
```
public static double[] readAllDoubles()
```
    Read all doubles until the end of input is reached, and return them.
  - readInts
```
public static int[] readInts()
```
    Deprecated. For more consistency, use readAllInts()
    
    Reads all ints from stdin.
  - readDoubles
```
public static double[] readDoubles()
```
    Deprecated. For more consistency, use readAllDoubles()
    
    Reads all doubles from stdin.
  - readStrings
```
public static String[] readStrings()
```
    Deprecated. For more consistency, use readAllStrings()
    
    Reads all Strings from stdin.
  - main
```
public static void main(String[] args)
```
    Interactive test of basic functionality.

Class StdIn

Method Summary

Methods inherited from class java.lang.Object

Method Detail

isEmpty

hasNextLine

hasNextChar

readLine

readChar

readAll

readString

readInt

readDouble

readFloat

readLong

readShort

readByte

readBoolean

readAllStrings

readAllInts

readAllDoubles

readInts

readDoubles

readStrings

main