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Fixed old blog posts
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2 changed files with 28 additions and 159 deletions
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@ -23,76 +23,15 @@ kind:
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---
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Sometimes you want to format your outputs. This is a quick cheatsheet containing the differerent escape sequences
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<table class="tg">
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<tr>
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<th class="tg-yw4l">
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Character
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</th>
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<th class="tg-yw4l">
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Escape Sequence
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</th>
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</tr>
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| Character | Escape Sequence |
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| ------------ | --------------- |
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| Newline | \n |
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| Tab | \t |
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| Backspace | \b |
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| Double Quote | \” |
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| Single Quote | \’ |
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| Backslash | \\ |
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<tr>
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<td class="tg-yw4l">
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Newline
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</td>
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<td class="tg-yw4l">
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\n
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</td>
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</tr>
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<tr>
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<td class="tg-yw4l">
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Tab
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</td>
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<td class="tg-yw4l">
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\t
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</td>
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</tr>
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<tr>
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<td class="tg-yw4l">
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Backspace
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</td>
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<td class="tg-yw4l">
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\b
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</td>
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</tr>
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<tr>
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<td class="tg-yw4l">
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Double Quote
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</td>
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<td class="tg-yw4l">
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\”
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</td>
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</tr>
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<tr>
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<td class="tg-yw4l">
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Single Quote
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</td>
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<td class="tg-yw4l">
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\’
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</td>
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</tr>
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<tr>
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<td class="tg-yw4l">
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Backslash
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</td>
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<td class="tg-yw4l">
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\\
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</td>
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</tr>
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</table>
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@ -21,110 +21,40 @@ mf2_mp-syndicate-to:
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kind:
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- note
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---
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To obtain console input for your program you can use the <code class="language-java">Scanner</code> class
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To obtain console input for your program you can use the `Scanner` class
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First import the relevant library
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<pre class="language-java"><code class="language-java">
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```java
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import java.util.Scanner;
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</code></pre>
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```
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Then create a variable to hold the <code class="language-java">Scanner</code> object
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Then create a variable to hold the `Scanner` object
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<pre class="language-java"><code class="language-java">
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```java
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Scanner input;
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input = new Scanner(System.in);
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</code></pre>
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```
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Inside the parenthesis, the <code class="language-java">Scanner</code> binds to the System input which is by default the console
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Inside the parenthesis, the `Scanner` binds to the System input which is by default the console
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The new varible <code class="language-java">input</code> now has the ability to obtain input from the console. To do so, use any of the following methods
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The new varible `input` now has the ability to obtain input from the console. To do so, use any of the following methods:
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<table class="tg">
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<tr>
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<th class="tg-yw4l">
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Method
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</th>
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| Method | What it Returns |
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| -------------- | ---------------------------------------------------------- |
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| `next()` | The next space separated string from the console |
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| `nextInt()` | An integer if it exists from the console |
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| `nextDouble()` | A double if it exists from the console |
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| `nextFloat()` | A float if it exists from the console |
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| `nextLine()` | A string up to the next newline character from the console |
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| `hasNext()` | Returns true if there is another token |
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| `close()` | Unbinds the Scanner from the console |
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<th class="tg-yw4l">
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What it Returns
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</th>
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</tr>
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<tr>
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<td class="tg-yw4l">
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next()
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</td>
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<td class="tg-yw4l">
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The next space seperated string from the console
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</td>
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</tr>
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<tr>
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<td class="tg-yw4l">
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nextInt()
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</td>
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<td class="tg-yw4l">
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An integer if it exists from the console
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</td>
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</tr>
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<tr>
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<td class="tg-yw4l">
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nextDouble()
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</td>
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<td class="tg-yw4l">
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A double if it exists from the console
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</td>
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</tr>
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<tr>
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<td class="tg-yw4l">
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nextFloat()
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</td>
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<td class="tg-yw4l">
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A float if it exists from the console
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</td>
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</tr>
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<tr>
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<td class="tg-yw4l">
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nextLine()
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</td>
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<td class="tg-yw4l">
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A string up to the next newline character from the console
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</td>
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</tr>
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<tr>
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<td class="tg-yw4l">
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hasNext()
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</td>
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<td class="tg-yw4l">
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Returns true if there is another token
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</td>
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</tr>
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<tr>
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<td class="tg-yw4l">
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close()
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</td>
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<td class="tg-yw4l">
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Unbinds the Scanner from the console
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</td>
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</tr>
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</table>
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Here is an example program where we get the user’s first name
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<pre class="language-java"><code class="language-java">
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```java
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import java.util.Scanner;
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public class GetName {
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@ -135,4 +65,4 @@ public class GetName {
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System.out.println("Your first name is " + firstName);
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}
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}
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</code></pre>
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```
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