更新时间:2022-06-01 23:53:12
StringBuffer默认容量大小是16个字符。
public class Test {
public static void main(String[] args) {
StringBuffer sb = new StringBuffer("the");
System.out.println("sb is: " + sb);;
String str = null;
sb.append(str);
System.out.println("sb is: " + sb);;
}
}
public class Test {
public static void main(String[] args) {
StringBuffer sb = new StringBuffer("the");
System.out.println("sb.length: " + sb.length());
System.out.println("sb.capacity: " + sb.capacity());
sb.append(" redpig");
System.out.println("sb.length: " + sb.length());
System.out.println("sb.capacity: " + sb.capacity());
}
}
public class Test {
public static void main(String[] args) {
StringBuffer sb = new StringBuffer("the");
System.out.println("sb.length: " + sb.length());
System.out.println("sb.capacity: " + sb.capacity());
sb.append(" redpig is writting java programs");
System.out.println("sb.length: " + sb.length());
System.out.println("sb.capacity: " + sb.capacity());
}
}
public class Test {
public static void main(String[] args) {
StringBuffer sb = new StringBuffer("the");//original length is 3
System.out.println("sb.length: " + sb.length());
System.out.println("sb.capacity: " + sb.capacity());
sb.append(" redpig is writting java programs for fun");//string's length is 33
System.out.println("sb.length: " + sb.length());
System.out.println("sb.capacity: " + sb.capacity());
}
}