Java String.contains() – Java String.contains()

The method contains() checks if a String contains another String. The method accepts a CharSequence. So, we can pass any of the implementing classes to it such as StringBuilder and StringBuffer.

方法contains()检查一个字符串是否包含另一个字符串。该方法接受一个CharSequence。因此，我们可以向它传递任何一个实现类，如StringBuilder和StringBuffer。

Available Signatures

可用的签名

public boolean contains(CharSequence s)

Example

示例

@Test
public void whenCallContains_thenCorrect() {
    String s = "abcd";
    
    assertTrue(s.contains("abc"));
    assertFalse(s.contains("cde"));
}