File size: 592 Bytes
0284885 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | package StringBuilder_package;
public class StringBuilder_demo4 {
public static void main(String[] args) {
StringBuilder sb=new StringBuilder();
//容量：最多装多少
//长度：已经装了多少
System.out.println(sb.capacity());//16
System.out.println(sb.length());//0
sb.append("abc");
System.out.println(sb.capacity());//16
System.out.println(sb.length());//3
sb.append("asdfghjklsddcewe");
System.out.println(sb.capacity());//老容量 * 2 + 2
System.out.println(sb.length());
}
}
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