StringFormat for Java布尔运算符 [英] StringFormat for Java Boolean Operator

问题描述

我知道它非常简单的问题。但我想知道布尔运算符的stringformat。
例如，下面显示了整数，字符串和浮点数的字符串格式。什么可以为布尔运算符true / false？

I know its very simple question. but I would like to know the stringformat for boolean operator. For example, below shows the string formats for integer, string and float. what could be for boolean operator true/false?

System.out.printf("The value of the float " +
                  "variable is %f, while " +
                  "the value of the " + 
                  "integer variable is %d, " +
                  "and the string is %s", 
                  floatVar, intVar, stringVar); 

推荐答案

'b'或'B'一般如果参数arg为null，结果为false。如果arg是布尔值或布尔值，则结果是String.valueOf（arg）返回的字符串。否则，结果为true。
java docs： http：// docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#syntax

'b' or 'B' general If the argument arg is null, then the result is "false". If arg is a boolean or Boolean, then the result is the string returned by String.valueOf(arg). Otherwise, the result is "true". java docs : http://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#syntax

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