number-formatting

问题 Why some numbers are defined as not a number(NaN) in floating point arithmetic? (Although they can be represented by IEEE format and indeed are real numbers) 回答1: The author of the question also posted this comment: I don't understand how numbers for which "all exponent bits are 1's and mantissa is not all zeros" is not a real number. The reasoning behind this comment appears to be: A binary floating-point format has a sign bit s , some exponent bits e , and some significand bits f . For most

问题 Why some numbers are defined as not a number(NaN) in floating point arithmetic? (Although they can be represented by IEEE format and indeed are real numbers) 回答1: The author of the question also posted this comment: I don't understand how numbers for which "all exponent bits are 1's and mantissa is not all zeros" is not a real number. The reasoning behind this comment appears to be: A binary floating-point format has a sign bit s , some exponent bits e , and some significand bits f . For most

问题 Why some numbers are defined as not a number(NaN) in floating point arithmetic? (Although they can be represented by IEEE format and indeed are real numbers) 回答1: The author of the question also posted this comment: I don't understand how numbers for which "all exponent bits are 1's and mantissa is not all zeros" is not a real number. The reasoning behind this comment appears to be: A binary floating-point format has a sign bit s , some exponent bits e , and some significand bits f . For most

问题 I am exporting Data from SQL Server to Excel, utilizing SSIS Data Flow Task. Here all columns appear as Text despite export formatting. Hence I need to develop a SSIS Script task to do the necessary conversion. I am facing trouble in developing the script. Excel Workbook before Formatting See, the Excel Cell has no Apostrophe and the Number type is also "General" but the message says The number in this cell is formatted as text or preceded by an apostrophe I have Tried different options

问题 I have a Price column that displays integers in plain format like 1000000. I would like to know how can I format it with commas without affecting its value when retrieving with table.getValueAt()? Is there a method like table.setColumnCellFormat(decimalFormat)? 回答1: You need a custom TableCellRenderer which can format the value the way you need it. See Using Custom Renderers for more details import java.awt.BorderLayout; import java.awt.Component; import java.awt.EventQueue; import java.text

问题 I have a large array of doubles, which have a varying number of decimal places, such as: [11307.3, 1025.64, 1.27826, 1676.46, 0.584175, 183.792, 1.02237, 13.649, 0.472665, 127.604] I am attempting to format the number so there are commas every thousand and the decimal places are not formatted to a specific number such as 3dp. The array should look like [11,307.3, 1,025.64, 1.27826, 1,676.46, 0.584175, 183.792, 1.02237, 13.649, 0.472665, 127.604] I have tried doing this by defining

问题 I need to add zeroes, so that each number has at least two decimals, but without rounding. So for example: 5 --> 5.00 5.1 --> 5.10 5.11 --> 5.11 (no change) 5.111 --> 5.111 (no change) 5.1111 --> 5.1111 (no change) My function is missing an IF to check for less than two decimal places: function addZeroes( num ) { var num = Number(num); if ( //idk ) { num = num.toFixed(2); } return num; } Thanks! Posting an alternative answer, in addition to the two below. (Keep in mind that I'm no expert and

问题 I need to add zeroes, so that each number has at least two decimals, but without rounding. So for example: 5 --> 5.00 5.1 --> 5.10 5.11 --> 5.11 (no change) 5.111 --> 5.111 (no change) 5.1111 --> 5.1111 (no change) My function is missing an IF to check for less than two decimal places: function addZeroes( num ) { var num = Number(num); if ( //idk ) { num = num.toFixed(2); } return num; } Thanks! Posting an alternative answer, in addition to the two below. (Keep in mind that I'm no expert and

问题 I have a double whose value is 10,000,000.00 (ten millions). I have to convert it to a String . When using the method toString I am getting the String "1.0E7" which is correct following the specification. Unfortunately I need the String "10,000,000.00" (or the equivalent depending on the locale). How can achieve this? 回答1: Try either NumberFormat http://java.sun.com/javase/6/docs/api/java/text/NumberFormat.html DecimalFormat http://java.sun.com/javase/6/docs/api/java/text/DecimalFormat.html

问题 I have a double whose value is 10,000,000.00 (ten millions). I have to convert it to a String . When using the method toString I am getting the String "1.0E7" which is correct following the specification. Unfortunately I need the String "10,000,000.00" (or the equivalent depending on the locale). How can achieve this? 回答1: Try either NumberFormat http://java.sun.com/javase/6/docs/api/java/text/NumberFormat.html DecimalFormat http://java.sun.com/javase/6/docs/api/java/text/DecimalFormat.html