【Java】Eclipse中代码格式化教程

野性酷女 2024-03-22 09:27 76阅读 0赞

##### 一、手动格式化 #####

1、打开程序，选中要格式化的代码  
![在这里插入图片描述][bbdc1bf57961413da609d8cdac16682c.png]  
2、点击菜单栏上的`Source`菜单  
![在这里插入图片描述][4e56d6c1d86247f3a95bd8e4083be8c9.png]  
3、点击下拉菜单上的`Format`选项即可  
![在这里插入图片描述][7dc372af74694af19b7548b93ea027c9.png]  
4、代码已格式化  
![在这里插入图片描述][32386b0f7ed5482db804adaabf4a69e7.png]  
源码：

package TestDemo;
    
    import java.util.Scanner;
    
    public class Cipher {
        
    	private static int[] enc_key = {
         6, 3, 0, 4, 5, 1, 2 }; // 加密密钥
    	private static int[] dec_key = {
         2, 5, 6, 1, 3, 4, 0 }; // 解密密钥
    
    	public static void main(String[] args) {
        
    		char[][] m = new char[2][7];
    		char[][] c = new char[2][7];
    		char[][] dec_m = new char[2][7];
    		System.out.println("请输入两行7个英文字符的明文：");
    		try (Scanner scanner = new Scanner(System.in)) {
        
    			m[0] = scanner.nextLine().toCharArray();
    			m[1] = scanner.nextLine().toCharArray();
    			for (int i = 0; i < 7; i++) {
        
    				c[0][enc_key[i]] = m[0][i];
    				c[1][enc_key[i]] = m[1][i];
    			}
    			for (int i = 0; i < 7; i++) {
        
    				dec_m[0][dec_key[i]] = c[0][i];
    				dec_m[1][dec_key[i]] = c[1][i];
    			}
    			System.out.println("您输入的原始明文为：");
    			System.out.println(m[0]);
    			System.out.println(m[1]);
    			System.out.println("加密结果为：");
    			System.out.println(c[0]);
    			System.out.println(c[1]);
    			System.out.println("解密结果为：");
    			System.out.println(dec_m[0]);
    			System.out.println(dec_m[1]);
    		} catch (Exception e) {
        
    			System.err.println(e);
    		}
    	}
    }

##### 二、自动格式化 #####

1、在菜单栏中，点击`Window`菜单  
![在这里插入图片描述][bd2216926947429bb18ebd179f43d510.png]  
2、下拉栏中选择`Preferences`  
![在这里插入图片描述][39c02cd8ae8e465d8b470bc2e5d6f117.png]  
3、点击`Java`，选择`Editor`，再点击`Save Actions`选项  
![在这里插入图片描述][687637918d60423a8edd36f7dd853162.png]  
4、默认是没有勾选的，将其勾选上即可  
![在这里插入图片描述][a0ab28ca900d45d6bb1fde45d408cdfe.png]  
5、简单测试一下  
代码：

package TestDemo;
    
    public class Rotor {
        
    	public static void main(String args[])
    	{
        
    	String str="rotor",sub1;
    	int i=0,n;
    	boolean yes=true;
    	if (args.length>0)
    	str=args[0];
    	System.out.println("str="+str);
    	n=str.length();
    	char ch1,ch2;
    	String temp="";
    	for (i=0;i<n;i++) {
        
    	sub1=str.substring(i,i+1);
    	temp=sub1+temp; }
    	System.out.println("temp="+temp);
    	System.out.println(str+":"+str.equals(temp));
    	}
    }

Ⅰ、新建好的类还没有保存代码  
![在这里插入图片描述][c1c49573c9e14341ad2a136e59e1092b.png]  
Ⅱ、代码写好后，`Ctrl+s`保存，代码会自动格式化  
![在这里插入图片描述][b429cce7937249c1b7d99c0ed73b8f43.png]

[bbdc1bf57961413da609d8cdac16682c.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/e53d5ce2143e49eebceb4e6161500955.png
[4e56d6c1d86247f3a95bd8e4083be8c9.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/6d298ffe0fec492fa47a2f6c2abc605f.png
[7dc372af74694af19b7548b93ea027c9.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/67fff0f8adc34ebc84690a6a862effb7.png
[32386b0f7ed5482db804adaabf4a69e7.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/427cadb369e04ba8a940ce8eb00a2a0e.png
[bd2216926947429bb18ebd179f43d510.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/25f4ba7e2089470bba7d43fa78163a69.png
[39c02cd8ae8e465d8b470bc2e5d6f117.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/1185a0d4bab948b9bce1f31f293226d5.png
[687637918d60423a8edd36f7dd853162.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/2e7c599745d349c689de09177b05031c.png
[a0ab28ca900d45d6bb1fde45d408cdfe.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/a6c37b08065245678b920bfd7908b436.png
[c1c49573c9e14341ad2a136e59e1092b.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/b79711741e2d4c95b41340f61255808a.png
[b429cce7937249c1b7d99c0ed73b8f43.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/57b72c06dd4d4f87b976bc802221c060.png