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Using floating-point conversion characters

public class MainClass  {    public static void main( String args[] )    {        System.out.printf( "%e\n", 12345678.9 );       System.out.printf( "%e\n", +12345678.9 );       System.out.printf( "%e\n", -12345678.9 );       System.out.printf( "%E\n", 12345678.9 );       System.out.printf( "%f\n", 12345678.9 );       System.out.printf( "%g\n", 12345678.9 );       System.out.printf( "%G\n", 12345678.9 );    } } 1.234568e+07 1.234568e+07 -1.234568e+07 1.234568E+07 12345678.900000 1.23457e+07 1.23457E+07