package ss1;
/** * StringBuffer类的截取功能: * public String substring(int start)返回一个新的 String,它包含此字符序列当前所包含的字符子序列。 * public CharSequence subSequence(int start,int end)返回一个新的字符序列,该字符序列是此序列的子序列。 */ ==========================练习一=====================
public class Menu { public static void main(String[] args) { StringBuffer sb = new StringBuffer(); sb.append("hello").append("world"); String s = sb.substring(5); System.out.println("sb: "+sb); System.out.println("s: "+s); } } 结果:
sb: helloworld
s: world ==========================练习二===================== public class Menu { public static void main(String[] args) { StringBuffer sb = new StringBuffer(); sb.append("hello").append("world"); String s = sb.substring(5,6); System.out.println("sb: "+sb); System.out.println("s: "+s); } } 结果:
sb: helloworld
s: w |
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