57 lines
2 KiB
Java
57 lines
2 KiB
Java
public class PrintF {
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public static void main(String[] args){
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String name = "Spongebob";
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char firstletter = 'S';
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int age = 30;
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double height = 60.5;
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boolean isEmployed = true;
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System.out.printf("Hello %s\n", name); // %s → formats a String
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System.out.printf("Your name starts with a %c\n", firstletter); // %c → formats a single character (char)
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System.out.printf("You are %d years old\n", age); // %d → formats an integer (decimal number)
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System.out.printf("You are %f inches tall\n", height); // %f → formats a floating-point number (double / float)
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System.out.printf("Employed: %b\n", isEmployed); // %b → formats a boolean (true / false)
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// You can include multiple format specifiers in one print statement.
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System.out.printf("%s is %d years old. He is %f inches tall\n", name, age, height);
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// IMPORTANT: The values MUST be in the same order as the format specifiers.
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double price = 9.99;
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double price2 = -19.99;
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double price3 = 19999.99;
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// You can add special characters to alter how floats are shown
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// a point '.' followed by a number specifies how many decimal places are shown
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// A '+' shows a positive sign before the number
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// // ( means that negative numbers are shown enclosed in ()
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// 'space' means display a minus if negative, and a space if positive
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// a ',' will add a comma grouping separator to the thousandths place
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System.out.printf("The price for one is $% .2f, for two is $% .2f, and for 100 is $%,.2f\n", price, price2, price3);
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// width
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int id1 = 1;
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int id2 = 23;
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int id3 = 456;
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int id4 = 7890;
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// 0 = zero padding
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// number = right justified padding
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// negative number = left justified padding
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System.out.printf("%4d\n", id1);
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System.out.printf("%4d\n", id2);
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System.out.printf("%4d\n", id3);
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System.out.printf("%4d\n", id4);
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}
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}
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