Method Overloading
Suppose that you have a class that can use calligraphy to draw
various types of data (strings, integers, and so on) and that contains a method
for drawing each data type.
It is cumbersome to use a new name for each method—for example,
drawString, drawInteger, drawFloat, and so on.
Alternatively, we can use four methods named draw with different
parameter list.
Thus, the data drawing class might declare four methods named
draw, each of which has a different parameter list.
public class DataArtist {
...
public void draw(String s) {
...
}
public void draw(int i) {
...
}
public void draw(double f) {
...
}
public void draw(int i, double f) {
...
}
}
static String valueOf(boolean b)
static String valueOf(char c)
static String valueOf(char[] data)
static String valueOf(char[] data, int offset, int count)
static String valueOf(double d)
static String valueOf(float f)
static String valueOf(int i)
static String valueOf(long l)
static String valueOf(Object obj)
This means that if
we have any
type of variable, we can get a String representation of it by using
String.valueOf(variable).
draw(String s) and draw(int i) are distinct and unique methods because
they require different argument types.
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