/**
* The Cap specifies the treatment for the beginning and ending of
* stroked lines and paths. The default is BUTT.
*/
public enum Cap {
/**
* The stroke ends with the path, and does not project beyond it.
*/
BUTT (0),
/**
* The stroke projects out as a semicircle, with the center at the
* end of the path.
*/
ROUND (1),
/**
* The stroke projects out as a square, with the center at the end
* of the path.
*/
SQUARE (2);
private Cap(int nativeInt) {
this.nativeInt = nativeInt;
}
final int nativeInt;
}
這是cap的源碼，從源碼我們看到BUTT是預設的設置，但是我們看不出BUTT、ROUND、SQUARE的區別。
下面看幾張圖片，我想足以理解Cap的用途。
BUTT
ROUND
SQUARE
上表就是三種樣式的區別，分隔號處即為畫筆結束處，圖中區別明顯，在此不再贅述。
接著我們看Join，Join的理解也很容易，他是用來控制畫的圖形接觸時候的樣式的。
看源碼：
/**
* The Join specifies the treatment where lines and curve segments
* join on a stroked path. The default is MITER.
*/
public enum Join {
/**
* The outer edges of a join meet at a sharp angle
*/
MITER (0),
/**
* The outer edges of a join meet in a circular arc.
*/
ROUND (1),
/**
* The outer edges of a join meet with a straight line
*/
BEVEL (2);
private Join(int nativeInt) {
this.nativeInt = nativeInt;
}
final int nativeInt;
}
和Cap類似，看源碼也就看出了預設是MITER，其他具體形狀還是難以理解。 接著看圖：
MITER
ROUND
BEVEL
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