StringBuffer 在 Java 中插入()
哎哎哎:# t0]https://www . geeksforgeeks . org/string buffer-insert-Java/
StringBuffer.insert()方法将给定数据类型的字符串表示形式插入到 StringBuffer 中的给定位置。
语法:
str.insert(int position, char x);
str.insert(int position, boolean x);
str.insert(int position, char[] x);
str.insert(int position, float x);
str.insert(int position, double x);
str.insert(int position, long x);
str.insert(int position, int x);
position is the index in string where
we need to insert.
返回:
This method returns a reference to this object.
例外:
The position argument must be greater
than or equal to 0, and less than
or equal to the length of this string.
布尔输入
// Java program to demonstrate StringBuffer insert
// for boolean input.
import java.lang.*;
public class GFG {
public static void main(String[] args)
{
StringBuffer str =
new StringBuffer("geeks for geeks");
System.out.println("string = " + str);
// insert boolean value at offset 8
str.insert(8, true);
// prints stringbuffer after insertion
System.out.print("After insertion = ");
System.out.println(str.toString());
}
}
Output:
string = geeks for geeks
After insertion = geeks fotruer geeks
字符输入
// Java program to demonstrate StringBuffer insert
// for char input.
import java.lang.*;
public class GFG {
public static void main(String[] args)
{
StringBuffer str =
new StringBuffer("geeks for geeks");
System.out.println("string = " + str);
// insert boolean value at offset 8
str.insert(8, 'p');
// prints stringbuffer after insertion
System.out.print("After insertion = ");
System.out.println(str.toString());
}
}
Output:
string = geeks for geeks
After insertion = geeks fopr geeks
字符数组输入
// Java program to demonstrate StringBuffer insert
// for char array input.
import java.lang.*;
public class GFG {
public static void main(String[] args)
{
StringBuffer str =
new StringBuffer("geeks for geeks");
System.out.println("string = " + str);
// character array to be inserted
char cArr[] = { 'p', 'a', 'w', 'a', 'n' };
// insert character array at offset 9
str.insert(8, cArr);
// prints stringbuffer after insertion
System.out.print("After insertion = ");
System.out.println(str.toString());
}
}
Output:
string = geeks for geeks
After insertion = geeks fopawanr geeks
浮动输入
// Java program to demonstrate StringBuffer insert
// for float input.
import java.lang.*;
public class GFG
{
public static void main(String[] args)
{
StringBuffer str =
new StringBuffer("geeks for geeks");
System.out.println("string = " + str);
// insert float value at offset 3
str.insert(8, 41.35f);
// prints stringbuffer after insertion
System.out.print("After insertion = ");
System.out.println(str.toString());
}
}
Output:
string = geeks for geeks
After insertion = geeks fo41.35r geeks
双输入
// Java program to demonstrate StringBuffer insert
// for double input.
import java.lang.*;
public class GFG
{
public static void main(String[] args)
{
StringBuffer str =
new StringBuffer("geeks for geeks");
System.out.println("string = " + str);
// insert float value at offset 3
str.insert(8, 41.35d);
// prints stringbuffer after insertion
System.out.print("After insertion = ");
System.out.println(str.toString());
}
}
Output:
string = geeks for geeks
After insertion = geeks fo41.35r geeks
长输入
// Java program to demonstrate StringBuffer insert
// for Long input.
import java.lang.*;
public class GFG
{
public static void main(String[] args)
{
StringBuffer str = new StringBuffer("geeks for geeks");
System.out.println("string = " + str);
// insert float value at offset 3
str.insert(8, 546986L);
// prints stringbuffer after insertion
System.out.print("After insertion = ");
System.out.println(str.toString());
}
}
Output:
string = geeks for geeks
After insertion = geeks fo546986r geeks
内部输入
// Java program to demonstrate StringBuffer insert
// for Int input.
import java.lang.*;
public class GFG
{
public static void main(String[] args)
{
StringBuffer str =
new StringBuffer("geeks for geeks");
System.out.println("string = " + str);
// insert float value at offset 8
int x = 10;
str.insert(8, x);
// prints stringbuffer after insertion
System.out.print("After insertion = ");
System.out.println(str.toString());
}
}
Output:
string = geeks for geeks
After insertion = geeks fo10r geeks
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