1: //TestFormatStringBuilder.java 2: 3: public class TestFormatStringBuilder 4: { 5: public static void main(String[] args) 6: { 7: //String fmt = "%8.3f"; 8: String fmt = "%"; 9: fmt += 8; 10: fmt += "."; 11: fmt += 3; 12: fmt += "f"; 13: System.out.format(fmt, 1.2); 14: System.out.println(); 15: } 16: }