最简单的方法是使用System.out.println()函数将boolean类型的值输出到控制台。下面是一个示例代码: booleanflag=true;System.out.println("flag的值为:"+flag); 1. 2. 输出结果为: flag的值为:true 1. 方法二:使用System.out.print() 如果我们不想在输出后换行,可以使用System.out.print()函数。示例代码如...
public void print(String name, int qty, double price) { f.format("%-15.15s %5d %10.2f\n", name, qty, price); //name是左对齐并且最多15个字符,包括空格。price最多小数点后两位。 total += price; } public void printTotal() { f.format("%-15s %5s %10.2f\n", "Tax", "", total...
PrintWriter format(String format, Object... args)voidprint(floatfnum)voidprint(doublednum)voidprint(String str)voidprint(Object obj)voidprint(charch)voidprint(char[] charArray)voidprint(longlnum)voidprint(intinum)voidprint(booleanbool) PrintWriter printf(Locale l, String format, Object... args)...
}publicvoidprint(String name,intqty,doubleprice) {//%-15.15s:字符串左对齐,最小长度为15,最大长度也为15//%10.2f:最小长度为10,其中小数占两位f.format("%-15.15s %5d %10.2f\n",name,qty,price); total+=price; }publicvoidprintTotal() { f.format("%-15s %5s %10.2f\n","Tax","",to...
publicFileOutputStream(File file,boolean append)throws FileNotFoundException{ 上述两段代码是我截取 的FileOutputStream.java的源码,可以看到,如果在获取FileOutStream对象时,不传第二个参数,则默认为false,而第二个参数的意思是append,即追加 所以可以说两点 ...
printStackTrace(); } /** * 获取现在时间 * * @return返回字符串格式 yyyy-MM-dd HH:mm:ss */ public static String getStringDate() { Date currentTime = new Date(); SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String dateString = formatter.format(currentTime...
' '{print $(NF-1)}' aaa.txt输出前2行的第2列的值shell awk -F ',' '{print $2}' ...
4. Boolean Formatting To format Boolean values, we use the%bformat. According to thedocs, it works the following way: if the second argument isnull, then the result is “false”. If the argument is abooleanorBoolean, then the result is the string returned byString.valueOf(arg). Otherwis...
If the argument is a boolean or Boolean, then the result is the string returned by String.valueOf(). Otherwise, the result is "true". If the '#' flag is given, then a FormatFlagsConversionMismatchException will be thrown. 'B' '\u0042' The upper-case variant of 'b'. 'h' '...
PrintWriterformat(Stringformat,Object... args) 使用指定格式字符串和参数将一个格式化字符串写入此 writer 中。 voidprint(boolean b) 打印boolean 值。 voidprint(char c) 打印字符。 voidprint(char[] s) 打印字符数组。 voidprint(double d) 打印double 精度浮点数。