Java System.out.println 格式
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Java System.out.println format
提问by totpiko
I need the system out println to do this format so that the number of whitespaces between the first column and the second column varies based on the content. So the second column is always alligned.
我需要系统 out println 来执行此格式，以便第一列和第二列之间的空格数因内容而异。所以第二列总是对齐的。
Any way to set the second column to start at fixed position?
有什么办法可以将第二列设置为从固定位置开始？
token: accept lexical unit: ACCEPT_KEYWORD
token: a lexical unit: IDENTIFIER
token .\'n' lexical unit: END_OF_INSTRUCTION
token: perform lexical unit: PERFORM_KEYWORD
token: find lexical unit: IDENTIFIER
token: until lexical unit: UNTIL_KEYWORD
token: b lexical unit: IDENTIFIER
token: = lexical unit: EQUALS_SIGN
token: 0 lexical unit: INTEGER
token .\n lexical unit: END_OF_INSTRUCTION
采纳答案by 4gus71n
Here you have buddy:
你有朋友：
public class Test {
public static class Logger {
private static final int MAX_WHITESPACES = 20;
public static void s(String token, String lex) {
String whitespaces = new String(new char[Math.abs(token.length()-MAX_WHITESPACES)]).replace('##代码##', ' ');;
String line = String.format("token: %s"+whitespaces+"lexical unit: %s", token, lex);
System.out.println(line);
}
}
public static void main(String[] args) {
Logger.s("accept","ACCEPT_KEYWORD");
Logger.s("a","IDENTIFIER");
Logger.s(".\'n'","END_OF_INSTRUCTION");
Logger.s("perform","PERFORM_KEYWORD");
}
}
Take note that all your tokens must be < MAX_WHITESPACES
请注意，您的所有代币必须 < MAX_WHITESPACES
回答by user1676075
Use String.format()to create a formatted line.
For more information.
使用String.format()创建一个格式化的线。
想要查询更多的信息。
Use a width for the token that's the same for all fields, larger than the max token size, and it will line up.
为所有字段使用相同的令牌宽度，大于最大令牌大小，它将对齐。
