blocks|key|660457|text|http://java.sun.com/j2se/1.5.0/docs/api/java/text/MessageFormat.html|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|660458|entityMap|0|LINK|mutability|MUTABLE|url^0|0|1W|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@$A|L|B|M|1|N]]|C|$]]|$1|D|3|-4|5|6|7|O|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|4]]]]

<a href="http://java.sun.com/j2se/1.5.0/docs/api/java/text/MessageFormat.html" rel="nofollow noreferrer">http://java.sun.com/j2se/1.5.0/docs/api/java/text/MessageFormat.html</a>

blocks|key|596325|text|您正在查找字段长度。尝试使用以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|596326|printf+("%25-32s+%25f\n",+pt.toString(),+conditionalProbs[1])|code-block|syntax|javascript|596327|-32告诉您字符串应该左对齐，但是字段长度为32个字符(根据您的喜好进行调整，我选择了32，因为它是8的倍数，这是终端上正常的制表位)。在标题上使用相同的代码，但使用%25s而不是%25f将使这一行变得更好。|offset|length|style|CODE|596328|entityMap^0|0|0|2B|2|2G|2|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]|$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

You're looking for field lengths. Try using this:

<pre><code>printf ("%-32s %f\n", pt.toString(), conditionalProbs[1])
</code></pre>

The -32 tells you that the string should be left justified, but with a field length of 32 characters (adjust to your liking, I picked 32 as it is a multiple of 8, which is a normal tab stop on a terminal). Using the same on the header, but with <code>%s</code> instead of <code>%f</code> will make that one line up nicely too.

blocks|key|596330|text|怎么样|type|unstyled|depth|inlineStyleRanges|entityRanges|data|596331|System.out.printf("%25-30s+%25f\n",+pt.toString(),+conditionalProbs[1]);|code-block|syntax|javascript|596332|请参阅more+information+on+the+Formatter+mini-language的文档。|offset|length|596333|entityMap|0|LINK|mutability|MUTABLE|url|http://java.sun.com/j2se/1.5.0/docs/api/java/util/Formatter.html^0|0|0|3|1B|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

How about

<pre><code>System.out.printf("%-30s %f\n", pt.toString(), conditionalProbs[1]);
</code></pre>

See the docs for <a href="http://java.sun.com/j2se/1.5.0/docs/api/java/util/Formatter.html" rel="nofollow noreferrer">more information on the Formatter mini-language</a>.

blocks|key|660537|text|你需要的是令人惊叹而又免费的format()。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|660538|它的工作方式是让您在模板字符串中指定占位符；它生成模板和值的组合作为输出。|660539|示例：|660540|System.out.format("%25-25s+%259.7f%25n",+"K+and+Burstner",+0.055170);|code-block|syntax|javascript|660541|660542|%25s是字符串的占位符；|unordered-list-item|660543|%2525s表示空白-将任何给定的字符串填充到25+characters.|660544|%25-25s表示字段中的字符串左对齐，例如，string.|660545|%259.7f右侧的pad表示输出一个浮点数，该数字总共有9位，decimal.|660546|%25n右侧的7位是“执行”行终止符所必需的，这是从System.out.format().|660547|转到System.out.println()时所缺少的|660548|或者，您可以使用|660549|String+outputString+=+String.format("format-string",+arg1,+arg2...);|660550|创建输出字符串，然后使用|660551|System.out.println(outputString);|660552|像以前一样打印它。|660553|entityMap^0|E|8|0|0|0|0|0|0|2|0|0|4|0|0|5|0|0|5|0|0|2|O|J|0|2|K|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1E|8|@$9|1F|A|1G|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1H|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|1I|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|1J|8|@]|D|@]|E|$M|N]]|$1|O|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]|$1|P|3|Q|5|R|7|1L|8|@$9|1M|A|1N|B|C]]|D|@]|E|$]]|$1|S|3|T|5|R|7|1O|8|@$9|1P|A|1Q|B|C]]|D|@]|E|$]]|$1|U|3|V|5|R|7|1R|8|@$9|1S|A|1T|B|C]]|D|@]|E|$]]|$1|W|3|X|5|R|7|1U|8|@$9|1V|A|1W|B|C]]|D|@]|E|$]]|$1|Y|3|Z|5|R|7|1X|8|@$9|1Y|A|1Z|B|C]|$9|20|A|21|B|C]]|D|@]|E|$]]|$1|10|3|11|5|6|7|22|8|@$9|23|A|24|B|C]]|D|@]|E|$]]|$1|12|3|13|5|6|7|25|8|@]|D|@]|E|$]]|$1|14|3|15|5|L|7|26|8|@]|D|@]|E|$M|N]]|$1|16|3|17|5|6|7|27|8|@]|D|@]|E|$]]|$1|18|3|19|5|L|7|28|8|@]|D|@]|E|$M|N]]|$1|1A|3|1B|5|6|7|29|8|@]|D|@]|E|$]]|$1|1C|3|-4|5|6|7|2A|8|@]|D|@]|E|$]]]|1D|$]]

What you need is the amazing yet free <code>format()</code>.

It works by letting you specify placeholders in a template string; it produces a combination of template and values as output.

Example:

<pre><code>System.out.format("%-25s %9.7f%n", "K and Burstner", 0.055170);
</code></pre>

<ul>
<li><code>%s</code> is a placeholder for Strings; </li>
<li><code>%25s</code> means blank-pad any given String to 25 characters.</li>
<li><code>%-25s</code> means left-justify the String in the field, i.e. pad to the right of the string.</li>
<li><code>%9.7f</code> means output a floating-point number with 9 places in all and 7 to the right of the decimal.</li>
<li><code>%n</code> is necessary to "do" a line termination, which is what you're otherwise missing when you go from <code>System.out.println()</code> to <code>System.out.format()</code>.</li>
</ul>

Alternatively, you can use 

<pre><code>String outputString = String.format("format-string", arg1, arg2...);
</code></pre>

to create an output String, and then use 

<pre><code>System.out.println(outputString);
</code></pre>

as before to print it.

blocks|key|660575|text|也许java.io.PrintStream的printf和/或format方法就是您要找的……|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|660576|entityMap|0|LINK|mutability|MUTABLE|url|http://java.sun.com/j2se/1.5.0/docs/api/java/io/PrintStream.html#printf(java.lang.String,%2520java.lang.Object...)|1|http://java.sun.com/j2se/1.5.0/docs/api/java/io/PrintStream.html#format(java.lang.String,%2520java.lang.Object...)^0|2|J|M|6|V|6|M|6|0|V|6|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|C]|$9|U|A|V|B|C]]|D|@$9|W|A|X|1|Y]|$9|Z|A|10|1|11]]|E|$]]|$1|F|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]|N|$5|I|J|K|E|$L|O]]]]

Perhaps <code>java.io.PrintStream</code>'s <a href="http://java.sun.com/j2se/1.5.0/docs/api/java/io/PrintStream.html#printf(java.lang.String,%20java.lang.Object...)" rel="nofollow noreferrer"><code>printf</code></a> and/or <a href="http://java.sun.com/j2se/1.5.0/docs/api/java/io/PrintStream.html#format(java.lang.String,%20java.lang.Object...)" rel="nofollow noreferrer"><code>format</code></a> method is what you are looking for...

blocks|key|660607|text|使用j-text-utils，您可以打印到控制台的一个表，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|660608|📷|atomic|660609|​|660610|它就像这样简单：|660611|TextTable+tt+=+new+TextTable(columnNames,+data);+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
tt.printTable();+++|code-block|syntax|javascript|660612|API还允许排序和行号...|660613|entityMap|0|LINK|mutability|MUTABLE|url|https://code.google.com/p/j-text-utils/|1|IMAGE|IMMUTABLE|imageUrl|https://i.stack.imgur.com/13kmb.png|imageAlt^0|2|C|0|0|0|1|1|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@]|9|@$A|16|B|17|1|18]]|C|$]]|$1|D|3|E|5|F|7|19|8|@]|9|@$A|1A|B|1B|1|1C]]|C|$]]|$1|G|3|H|5|6|7|1D|8|@]|9|@]|C|$]]|$1|I|3|J|5|6|7|1E|8|@]|9|@]|C|$]]|$1|K|3|L|5|M|7|1F|8|@]|9|@]|C|$N|O]]|$1|P|3|Q|5|6|7|1G|8|@]|9|@]|C|$]]|$1|R|3|-4|5|6|7|1H|8|@]|9|@]|C|$]]]|S|$T|$5|U|V|W|C|$X|Y]]|Z|$5|10|V|11|C|$12|13|14|-4]]]]

Using <a href="https://code.google.com/p/j-text-utils/" rel="nofollow noreferrer">j-text-utils</a> you may print to console a table like:
<img src="https://i.stack.imgur.com/13kmb.png" alt="">

And it as simple as:

<pre><code>TextTable tt = new TextTable(columnNames, data); 
tt.printTable(); 
</code></pre>

The API also allows sorting and row numbering ...

At the end of my computations, I print results:

<pre><code>System.out.println("\nTree\t\tOdds of being by the sought author");

for (ParseTree pt : testTrees) {
 conditionalProbs = reg.classify(pt.features());

 System.out.printf("%s\t\t%f", pt.toString(), conditionalProbs[1]);
 System.out.println();
}
</code></pre>

This produces, for instance:

<pre><code>Tree Odds of being by the sought author
K and Burstner 0.000000
how is babby formed answer 0.005170
Mary is in heat 0.999988
Prelim 1.000000
</code></pre>

Just putting two <code>\t</code> in there is sort of clumsy - the columns don't really line up. I'd rather have an output like this:

<pre><code>Tree Odds of being by the sought author
K and Burstner 0.000000
how is babby formed answer 0.005170
Mary is in heat 0.999988
Prelim 1.000000
</code></pre>

(note: I'm having trouble making the SO text editor line up those columns perfectly, but hopefully you get the idea.)

Is there an easy way to do this, or must I write a method to try to figure it out based on the length of the string in the "Tree" column?

Java: Easier pretty printing?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在我的计算结束时，我打印结果：System.out.println("\nTree\t\tOdds of being by the sought author");for (ParseTree pt : testTrees) { conditionalProbs = reg.classify(pt.features()...

问Java:更简单漂亮的打印？
EN

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问Java:更简单漂亮的打印？EN